List of working motherboards

[xCuri0]

Motherboards which don't support at least 2GB BAR size are considered not working.

If you're having any issues please see Common issues (and fixes) before replying.

Use this format in your comment:

• Motherboard: (motherboard model)
• GPU: (gpu model, include vram if it comes with multiple vram sizes)
• UEFIPatch: (yes or no depending on if you needed it)
• DSDT Patch: (yes or no depending on if you needed it)
• BAR Size: (BAR size that GPU-Z (Windows) or lspci (Linux) shows)
• RAM: (the amount of ram in your pc)
• Resume from sleep: (works or doesn't. if sleep doesnt work even without rebar then leave blank)
• Notes: any additional information and screenshots of GPU-Z Resizable BAR and GPU control panel showing rebar working optionally with CPU-Z and/or Device Manager Large Memory showing too.

User	Motherboard	GPU	BAR size tested	UEFIPatch req (Y/N)	Notes
@xCuri0	Gigabyte B75M-D3H	RX 580 8GB	8GB	Y	Requires DSDT modification
@romulus2k4	ASUS P8Z77-V PRO	RX 570 4GB	2GB	Y	4GB BAR works too just not in Windows due to AMD driver bug with 4GB Polaris
prazola (win-raid)	ASRock Z97 Extreme9	RX 6900 XT	16GB	Y	Requires DSDT modification to add QWordMemory
Miyconst	Huananzhi X99-QD4	RTX 3060	16GB	N
@sidex15	Jingsha X79M-S 1.0	RX 570 8GB	8GB	N
@dabm-git	Huananzhi X99-TF	Vega 64	8GB	N
@Tokobotenkai	ASUS Z97-Pro	Arc A770	16GB	Y
@cursemex	ASUS MAXIMUS VII HERO (Z97)	RX 6700 XT	16GB	Y	16GB BAR doesn't work with 32GB RAM
@val3nt33n	ASUS Z97i-Plus	Arc A750	8GB	Y
@Mak3rde	ASUS X99-A II	RX 6950 XT	16GB	Y
@LatiosAeon	ASUS Z170-WS	Arc A770	16GB	Y
@LatiosAeon	ASUS Z170 Sabertooth MARK 1	Arc A770	16GB	Y
@kodekq	ASUS Z170-A	RX 5700 XT	8GB	Y
@gyhmz	Gigabyte MZ32-AR0	Arc A380	8GB	N
@CiprianFlorin-Ifrim	Supermicro H11DSi-NT	RTX 4090	32GB	N
MD2 (win-raid)	Gigabyte B75M-D3H	RX 580 8GB	8GB	Y	Requires DSDT modification. Works with 2500k which is PCIe Gen2
@kkkyloo	Machinist X99-MR9A PRO V2	RX 6600	8GB	N
@SEt-t	ASUS Z170-P D3	RTX 3090	32GB	Y
@allesrebel	ASUS X99-DELUXE II	Arc A770	16GB	Y
@Intelevande	MSI Z97 Gaming 5	RTX 3060 Ti	8GB	N
@DanisMiryasov	ASUS STRIX X99 GAMING	RTX 3050	8GB	Y
@terminatorul	Gigabyte X470 AORUS GAMING 5 WiFi	Arc A770	16GB	N	BIOS officially supports ReBar on Zen 3 but not Zen 2 which needs this module
@Divin1ty666	ASUS Z97-DELUXE	RX 6700 XT	16GB	Y
@Phil-Libra	ASUS Z170-DELUXE	Arc A380	8GB	Y
@markmark2009	ASUS X99-DELUXE	RTX 3080 Ti	16GB	Y
@dsanke	ASUS Z170-DELUXE	RTX 3080	16GB	Y
@knasiotis	ASUS X99-DELUXE	RTX 3060 Ti	16GB	Y
@RafaelDiasCampos	ASRock X99 Extreme4	RTX 3070 Ti	8GB	N
@triple-octopus	MSI Z270 GAMING M5	RTX 3080 Ti	16GB	Y
Adiel235 (win-raid)	Gigabyte B365M Aorus Elite	RTX 3060 Ti	8GB	N	Have to connect iGPU to HDMI or won't boot
68k-dude (win-raid)	ASUS MAXIMUS VIII GENE (Z170)	Arc A770	16GB	Y
@dsanke	ASUS Z170-A	RX 5600 XT	8GB	Y	Sleep doesn't work because of 5600 XT override. Works with other GPUs
@originalm19	ASUS P8H61-M LX2 R2.0	RX 6600M	8GB	Y
@Koekieezz	Gigabyte H77-DS3H	RX 590 GME	8GB	Y	Requires DSDT modification. RTX 3060 Ti also works
@dsanke	MSI B150M PRO-VDH	RTX 3080	16GB	N
@necr0n	ASUS Z170-P	RTX 3090	32GB	Y
@dsanke	ASUS H110M-K	RTX 3080	16GB	Y
@JonasGMorsch	Huananzhi X99-F8	RTX 3060 Ti	16GB	N	RX 580 2048SP also works
@terryjx	ASUS X99M-WS	RTX A6000	64GB	Y
@aschor	ASRock X99 Taichi	RTX 3090	32GB	Y	Have to disable Above 4G Decoding Patch in setup
@GhoSt-1992	Asus Maximus VIII Hero (Z170)	RX 480	8GB	Y
@Nutst3r	ASUS X99-A	RX 6600	8GB	Y
@VictorS333	Huananzhi X79 "Green"	RX 580	8GB	N
@FusionDragon	Gigabyte Aorus B550M Pro-P (rev 1.0)	RX 5600 XT	8GB	N	Efiflash only works on BIOS F13 and lower
@robert789011	MSI Z97 Gaming 3	RX 6800	16GB	N
@SiliconExarch	ASUS X99-S	RTX 3070	8GB	Y
@therealRandomGenericDude	Supermicro X9DRI-LN4F	Arc A380	8GB	N	Had to use MMTool to insert the module
@Feyd1364	Asus Maximus VIII Hero (Z170)	RTX 4070 Ti	16GB	Y
@dsanke	MSI C236M WORKSTATION	Xe DG1	4GB	N	Rebar On is required to boot with this GPU
@kpwsyang	ASUS H170M-PLUS	RX 480	8GB	Y
@brafLake	ASUS EX-B150M-V3	RX 6600M	8GB	Y
@LordAdo96	Gigabyte B450 Aorus M	RX 580	8GB	N	Officially supports rebar only with Zen3 CPU
@Aushyro	ASUS Z170-E	RX 590	8GB	Y
@limyz	ASRock H77 Pro4-M	RTX 3080	16GB	Y	Requires DSDT modification
@Rubio85	Gigabyte AX370M-DS3H	RX 6700 XT	16GB	N	Have to use Flashrom DOS to flash
@Briggzy125	MSI Z170-A PRO	RX 6650 XT	8GB	Y	Had to use MMTool
@newborn2010	ASRockRack WC621D8A-2T	RTX A4000	32GB	N
@rekh127	ASUS Maximus IX Hero (Z270)	RX 5700 XT	8GB	Y	Arc A750 also works
@pnrxtx	ASRock Z170 Extreme4	RX 6800 XT	16GB
@sears-s	ASUS Z170-AR	Arc A380	8GB	Y
@MissBendy	MSI B150M Bazooka Plus	RX 6600 XT	8GB	Y
@matrixchanger	Asus Maximus V Gene (Z77)	RX 580	8GB	Y
@dormancygrace	ASUS Z270-A	RX 570	2GB	Y
@BatoMat	Gigabyte B450 AORUS ELITE	RX 590	8GB	N
mhi (win-raid)	ASRock Z97 Anniversary	RX Vega	8GB	Y	Requires DSDT modification to add QWordMemory
Bilbo571 (win-raid)	ASRock Fatal1ty Z97 Killer	Arc A750	8GB	Y	Requires DSDT modification to add QWordMemory
@Vlad00n	ASRock Z170 Extreme 4	RX 580	8GB	N
@Schlappenschleuder	ASUS SABERTOOTH Z97 MARK S	RX 5700 XT	8GB	Y
@denisdemaisbr	Machinist X99 MR9A Pro	RX 5500 XT	8GB	N
jo1902 (win-raid)	MSI H97M-G43	RX 6700 XT	16GB	N
@Kurtisdede	ASUS Z97-K	RX 6700	16GB	Y
@Gabus1983	MSI Z270-A PRO	RTX 3080	16GB	Y
@MissBendy	ASRock Z270M Extreme4	RX 6600 XT	8GB	Y
@CoderArceus	Gigabyte A320M-S2H	RX Vega 11 (iGPU)	1GB	N
Windius (win-raid)	Dell Precision Tower 7810	Arc A770	16GB	N
@Sir-Stroman	Asus Z170-A	Arc A750	8GB	Y
Scruffy (win-raid)	Dell R730	Arc A770	16GB	N
@rys995	Gigabyte B450M Gaming	RX 6700 XT	16GB	N	Downgrade BIOS to F52 (AGESA 1.0.0.6) to be able to flash modded latest BIOS (F64a used here)
@NedDarb	MSI Z170A Gaming M5	Arc A770	16GB	Y
@kaelso	Jingsha X99 D8	Arc A770	16GB	N
@zangliu2077	Gigabyte Z170-HD3	RX 5700 XT	8GB	Y	Need to downgrade my BIOS to F22C first (using Qflash) , then update the BIOS using modded BIOS with ReBAR inside (in this case I'm using modded F22C ). but “Invalid BIOS image” appears when flashing，Use the Efiflash_v0.87_DOS_Mod tool, get into FreeDOS, in the command prompt type in “efiflash NAMEOFBIOS.rom”，then it worked
@katapaltes	Gigabyte Z68MA-D2H-B3	RX 470 8GB	8GB	Y	Requires DSDT modification. Using U1C beta UEFI
@cdecaro3	Gigabyte GA-Z270P-D3	Arc A770 8GB	8GB	Y	Needed to use modified Efiflash running from FreeDOS to flash modified BIOS due to Qflash "Invalid bios image" error.
@janiss561	ASUS Z97-P	RX 6600	8GB	Y
@RRM5	Gigabyte AB350 Gaming	RX 6600	N
@u238	ASUS Z170-A	Arc A750	8GB	Y
@ravetank	ASUS ROG RAMPAGE V EDITION 10	RTX 3090	32GB	Y
@Fenivan	ASUS PRIME A320M-K	RX 6600	8GB	N
@driehoek91	ASRock H77 Pro4/MVP	RX 6800	16GB	Y	Requires DSDT modification. RX 580 8GB also works and OpenCore boots too
@400Ferrets	Dell Precision T3610	RTX 3060	8GB	N
@crashpb	ASUS Maximus VIII Hero Alpha	RX 6900 XT	16GB	Y	Resume from sleep doesn't work
@crashpb	ASUS Maximus VIII Impact	RTX 3070	8GB	Y	Resume from sleep doesn't work
@Nimayer	ASUS B150M-C	Arc A750	8GB	Y	Resume from sleep doesn't work. Flashed using flashrom
@X3Shadowknight	ASUS Z170I Pro Gaming	RTX 3060 Ti	8GB	Y	Flashed using AFUDOS
@anmolw	ASUS Strix Z270F Gaming	RTX 3070	8GB	Y	Flashed using AFUDOS backed up BIOS
Imperialz91 (win-raid)	ASUS Z97-P	RTX 3060 Ti	8GB	Y
SS_Seppuku (win-raid)	Gigabyte GAZ170X-Gaming 3	RX 6800 XT	16GB	Y	No display output from GPU until Windows boots
@drdanielwade	Gigabyte AORUS Z270X-Gaming 5	RTX 3060	16GB	Y	Resume from sleep works. Had to use modded Efiflash to flash the modified bios after booting into FreeDOS, Q-Flash gives Invalid BIOS error.
@RaduMemetea	HUANANZHI X99-F8D	RTX 3080	16GB	N
@KKallor	ASUS Z170-A	RTX 3080	16GB	Y	Had to use MMTool
@R1K1RU	ASUS X99 DELUXE II	RTX 3090	24GB	Y
@WillyTP	ASUS Z270A-Prime	RTX 3060 Ti	8GB	Y
@aquamacho1	Jginyue x99 Titanium D3	RX 6700 XT	16GB	N
@yudomsft	ASRock X99E-ITX/ac	RTX 4070	16GB	N	Resume from sleep works
@GloomySandwich	Asus Z97-A	RX 6800 XT	8GB	Y	16GB BAR doesn't work because of 32GB RAM. 6 beeps although system works
@ADTP	Gigabyte A320M-H	RX 6600	8GB	N	Resume from sleep works. Mobo supports Rebar for Zen 2 and Zen 3, used this to get it working on Zen+. Have to downgrade to BIOS version F52 (AGESA 1.0.0.6) for modded BIOS to install.
@Lock-The-Door	ASUS PRIME Z270-A	Arc A750	8GB	Y	Resume from sleep works. used /GAN to bypass verification
@Drakiel26	ASUS PRIME Z270-A	RX 580 4GB	2GB	Y	used /GAN to bypass verification
@ripkaby	ASUS Maximus VIII Extreme (Z170)	RTX 3080	16GB	Y	Resume from sleep works
@stetommy	MSI B250 Krait Gaming	Arc A770	16GB	Y
@Biogent	ASUS P8Z77 WS	RX 6700 XT	16GB	Y	Resume from sleep works. Strange fake (or no 🤔) "CSM disabled - No" but without ReBAR it turns to "Yes" without any changes in BIOS/EFI. There are warning beeps (1 long and 3 short) at startup and black screen due to Windows login screen (possibly to start GPU driver). But no any other errors or issues at all, ReBAR works perfectly.
@gwent98	MSI X99A MPOWER	RX Vega 56	8GB	N
@durdin85	MSI Z97A Gaming	Arc A770	8GB	Y	Sleep untested
@thierbig	MSI Z270 XPower Gaming Titanium	RTX 4070	16GB	N
@Dadovvv	Gigabyte GA-H110-D3A	RX 580 8GB	8GB	N	Everything works great except No bios display but Windows works
@pabloalber84	Dell Optiplex 7010 Q77	RX 580 8GB	8GB	Y	Requires DSDT modification. Resume from sleep works. See https://github.com/xCuri0/ReBarUEFI/issues/11#issuecomment-1585579241
@264-bit	ASRock Z97 Extreme3	RX 5700 XT	8GB	Y	Requires DSDT modification
@TodaLovErika	ASUS X99 E10G WS	RTX 4070	16GB	Y	Resume from sleep works. Arc A770 works too
@Affrounia	MSI Z97 PC MATE	RX 6700 XT	16GB	Y	Resume from sleep works
@Ckosmick	Gigabyte G1.Sniper Z170	RX 6700 XT	16GB	Y	Resume from sleep results in blank screen
@ochalam	MSI B450M PRO-VDH MAX	RX 580 4GB	2GB	N	Resume from sleep works
@aolszowka	ASRock Z77 Extreme4	Arc A380	8GB	Y	Requires DSDT modification. Resume from sleep works
@awesomekyle	Tyan S8030	Arc A380	8GB	N	Flashing required me to steps in the Annex of this page: https://winraid.level1techs.com/t/guide-how-to-flash-a-modded-ami-uefi-bios/30627. Video Option ROM needs to be set to Legacy to boot FlashROM
@Ph0rk0z	Supermicro X10DRG-OT+-CPU Broadwell	RTX 3090	32GB	N	Flash right from remote agent webui
@LatiosAeon	ASUS Prime Q270M-C	RTX 3090	32GB	Y
@lucash1978	Huananzhi X99-BD4	RTX 3060 Ti	8GB	N	Resume from sleep works
@Cartu-Nalgues	Gigabyte B450M H REV1.X	Arc A750	8GB	N
@DanielWhitt28	Asus Maximus IX Formula	RX 5700 XT 50th Anniversary	8GB	Y	Resume from sleep works
@E-DJ	Gigabyte Z77MX-D3H-TH	RX 6800	16GB	Y	Resume from sleep works. Requires DSDT modification
@EwanLight	MSI X99A Raider	RX 6700 XT	16GB	Y
@LaiSamy	MSI C236A WORKSTATION	RTX 3070	8GB	N	Resume from sleep works. Must enable 4G Decoding and disable CSM on first boot, or your'll get a vga debug and not boot.
@666cloudyy	QIYIDA HM70 LGA 1356	RX 470	4GB	N	Resume from sleep works, use 2GB BAR on Windows due to AMD driver bug
@Swiftb0y	MSI Z170 KRAIT GAMING	RX 6900 XT	16GB	Y	Resume from sleep works
@Acrivec	GA-Z170X-Gaming 7	RX 7900 XTX	32GB	Y	Resume from sleep works. Third attempt, my BIOS rolled back to factory F4 - and with that I've used efiflash_mod 0.65 on USB, using MS-DOS from rufus. Can't access bios. My guess is that this ReBAR is also 'enabled' on the integrated GPU (and it does not support it). Can't turn on secure boot.
@Fazzoc	Gigabyte B550I AORUS PRO AX	RX 5600 XT	8GB	N	Downgrade BIOS to be able to flash modified version
@NitrousZX	ASRock H61M-HG4	RX 580 4GB	2GB	Y	Requires DSDT modification
@Koekieezz	ASRock H97M Pro4	RX 580 8GB	8GB	Y	Resume from sleep works. Requires DSDT modification to add QWordMemory
@kagerou8124	TYAN S7109GM2NR-2T	RTX 3090	32GB	N
@sawok-git	Gigabyte Z170-HD3 DDR3-CF	RX Vega 64	16GB	Y
@kirusyaga	Gigabyte X299-WU8	Arc A750	8GB	Y	Use Q-Flash
@kgje	Supermicro X11DPI-NT	Arc A750	8GB	N	Modified BIOS updated using the BMC without issue
@RexSonic	MSI Z270 SLI PLUS	RTX 3070	8GB	Y	Resume from sleep works
@d4RkArchon	ASUS H170-PRO-GAMING	RTX 3070	8GB	Y	ASUS EZ Flash was blocking flashing of modified bios. Had to convert to rom file and flash with AMI flash tool.
@Baks456	ASUS P8Z77-V	RX 6600	8GB	Y	Resume from sleep works. Missing cursor in bios with enable rebar. When switching the BIOS on a video card (dual BIOS), you need to reset CMOS to work.
@Insane88	Gigabyte B365M DS3H	RTX 3060 Ti	8GB	Y
@Koekieezz	Gigabyte B75M-D3H	RX Vega 56	8GB	Y	Requires DSDT modification
@colepcsx2	ASUS X99-A	RTX 3090	32GB	Y	Resume from sleep works. After I extracted the CAP body and flashed it with the AMI Aptio IV BIOS tool, it worked all at once.
@98sec	GIGABYTE B450M DS3H	RX 5700 XT	8GB	N	Resume from sleep works. Downgrade BIOS to F52 (AGESA 1.0.0.6) to be able to flash modded latest BIOS (F64 used here)
@shrshnka	ASRock Z170 Pro4S	RTX 3070	8GB	Y	Resume from sleep works
@vinaoc	ASUS PRIME Z270-A	RX 580	8GB	Y	Resume from sleep works
@CNduan	Gigabyte Z97-HD3 2.1	RX 5700 XT	8GB	Y	Resume from sleep works
@andlbrei	ASUS SABERTOOTH Z170 S	Arc A770	16GB	Y	Sleep works after updating Intel ME. I could not get ASUS BIOS Flashback to work (selected file is not a proper BIOS), so I used AFUDOS to flash, worked great.
@ShockTime	ASUS Z170i Pro Gaming	RX 6700 XT	16GB	Y
@tiburcillo	Asus EX-B250M-V3	Pro W6600	8GB	Y	Resume from sleep works. Arc A770 8GB VRAM also works
@Flyw4vy	Optiplex 7010 MT	RX 5600	8GB	Y
@DarkRiDDeR	Huananzhi X79-ZD3RE V2	RX 590	8GB	N
@flamingleg	MSI Z170A PC MATE	RX 6600 XT	8GB	Y
@dbaggett262	MACHINIST X99-MR9D PLUS v2.0	RTX 3070	8GB	N	Used regular MACHINIST X99-MR9D shortcuts/info in Mi899 to run AMIFlash to extract stock BIOS and flash modded BIOS, since X99-MR9D PLUS (v2.0 or otherwise) is not in Mi899 database.
@Jun-TheTechShinobi	Dell OptiPlex 3010	Tesla M40	32GB	N	Below is the firmware section of my worklog, check the full blog post for hardware mod, server installing, and budget strategy for cheapskate.
@Baks456	Atermiter X99	RX 6700	16GB	N
@fyr233	TYAN S8030GM2NE	Moore Threads MTT S80	16 GB	N	This GPU requires resizeBAR. If not, the driver can't be installed. If the resizeBAR is 8GB, there will be many bugs. 16GB will be fine.
@ThanatosUA	Huanan X79 Gaming Deluxe	RTX 4070	16GB	N
@puuska	ThinkStation P500	RX 580 2048SP	8GB	N	Resume from sleep not working, black screen after resume. Flashing BIOS requires external programmer as the flash descriptor is locked and you cant flash anything except stock bios via lenovo's tool
@terminatorul	Gigabyte X399 AORUS Gaming 7 WiFi	RX 5700 XT	8GB	N	must be flashed from within UEFI setup, using QFlash option
@Rasmus715	MSI B150 Gaming M3	RX 6800 XT	16GB	Y	Resume from sleep works. Using in pair with Intel QTJ1 ES. Attaching BIOS with Re-BAR support and microcodes for Coffee Lake / ES here
@Karalux	ASRock IMB-180	RX 590	8GB	Y	Custom bios from AsRock to add above 4G decoding, IMB1801.70Rebar.zip
@FPSUsername	ASUS ROG Maximus VII Ranger	RX 6600	8GB	Y	Need to extract PCIeBus, PCIeHostBridge and NvramSmi from the UEFIPatch patched bios and replace the modules in an unpatched bios using MMTool 4.5. BdwUSB3.txt patch must also be included to fix keyboard issue. MAXIMUS-VII-RANGER-ASUS-3503-REBAR.zip
@fabriguzden	Gigabyte Z77X-UD5H	RTX 3060	16GB	Y	Requires DSDT modification. Z77XUD5H+ReBar+NVMe+4G Decode All Options Show.zip
@SignalSpectre	ASUS Rampage IV Formula	Arc A770	16GB	N	Resume from sleep works. X79 only needs DSDT patching if Linux. Don't use an ARC GPU with a 4 core ivy bridge cause no rebar can save you from the bad Intel driver optimization (in Overwatch I lost around 80 fps going from the RX570 to the ARC, in Apex the loss was about 60 fps, all of this with rebar enabled).
@jansebastiangr	ASUS ROG STRIX Z270G	Arc A770	8GB	Y	BIOS Flash ONLY works via AFUDOS (Rufus) USB Drive
@b800047	GIGABYTE B450M DS3H WIFI	Arc A770	16GB	N	Downgrade BIOS to F51 (AGESA 1.0.0.6) to be able to flash modded latest BIOS (F66b used here). shoutout to this video for giving me in idea on how i should install mine youtube.com/watch?v=waIjkovptXA
@jwagnervaz	Atermiter ZX-DU99D4	RX 5700 XT	8GB	N
@mrm1key	Asus Z170 PRO Gaming	Arc A770	16GB	Y
@YaZie96	ASRock Z97 Extreme 9	RTX 4070 Ti	16GB	Y	Resume from sleep works
@Hiuzuki	MUCAI P4-X99	RX 5500 XT	8GB	N	Make sure the options "BIOS Lock" and "Host-Flash Lock Down" ara disabled in BIOS. They are located in "Intel RCSetup Menu / PCH Configuration". Thanks to the Youtube user "@gabrielzika27"
@Thalhammer	Supermicro X10DRi-T	Arc A380	8GB	N
@Listenwzt	ASUS H97 PRO GAMER	RTX 4060 Ti	8GB	Y
@WarhammerTH	Gigabyte B360M D3P	MTT S80 16GB	16GB	Y	Using F14 BIOS
@77loop	ASRock X79 Extreme 9	RTX 3060	16GB	Y	Resume from sleep works
@xtomasnemec	ASUS TUF Z270 Mark 2	Arc A750	16GB	Y
@rootBrz	ASUS H110M-C	RX 580 8GB	8GB	Y	Used 4212 ver. of bios. Flashed .rom file through this guide, after patching .rom with UEFI Patch you need to extract body of the rom through UEFI Tool as shown in video. The size should be equal to 16384 KB, not 16386 KB. Also attached my modified bios in case someone needs it. bios.zip
@Le-choo	MSI B150i GAMING PRO	RX 6700	16GB	N
@NickjacksonD	ASUS H110M-C	Arc A750	8GB	Y	Followed the main guide, my bios file was 16777kb, installed anyway to test (same asus h110m-c board) and had black screen with gpu attached issues. Simply downloaded rootBRz 's file and installed it, and it worked!
@NitrousX	MSI X99A XPOWER GAMING TITANIUM	RTX 3080	16GB	Y	Flash using M-Flash over USB BIOS revision E7A21IMS.150
@itsmaxx1	Gigabyte A320-S2H (rev 3.0)	RX 6700 XT	16GB Y	Resume from sleep works. Need to downgrade BIOS to F2 to flash
@d0x360	Gigabyte X99A UD4 (WiFi) (rev 1.00)	RTX 3080 Ti	16GB	Y
@generaleramon	Biostar X370GTN	RX 5700 XT	8GB	N
@dima102russ	ASUS Z170 Pro Gaming	RX 5700 XT	8GB	Y	Resume from sleep doesn't work
@creble	Gigabyte B365M H	RTX 3060 Ti	8GB	8GB	Y	Resume from sleep works
@Dantrigger	ASUS Maximus IX Code	RTX 4090	32GB	Y
@shikulja	Asus Maximus IX Formula	RX 580 8GB	8GB	Y	Used Bios unlock (uefi) + FPT. The bios unlock + flashrom(dos internal) method also worked. After flashing Nvme+sata hard drives are not detected. Hard reset safe_boot+clear_cmos MB buttons helps.
@SlAvEnChIk	Asus Maximus VIII Ranger	RTX 4070	16GB	Y	Need to enable iGPU in BIOS
@Eugene-Dubovski	ASRock Z77 Pro4-M	Arc A750 8GB	8GB	Y	Requires DSDT modification. Resume from sleep works
@tiejam	ASUS Maximus VII FORMULA	RTX 4080	16GB	Y
@predprey2	ASUS Sabertooth Z77	RTX 4070 Ti	16GB	Y
@Pereira2004	Gigabyte AB350 gaming 3	RX 6700 XT	16GB	N	Had to downgrade BIOS to F31 to be abble to use Q-Flash and flash last one (F52n) with rebar mod inserted
@Supersiegger16	Gigabyte AX370 Gaming 3	RX 590	8GB	N	Flashing modified BIOS with FlashDOS 1.2 worked perfectly (while already having the newest BIOS (F51m) !) -> no need to downgrade due to security restriction of AGESA :)
@gj13	Gigabyte B450 Aorus Pro Wifi (rev 1.x)	RX 6700 XT	16GB	N	Resume from sleep works. didn't pass Q-Flash integrity check, so I flashed with Flashrom from winraid.level1techs.com/t/tool-flashrom-v1-2-dos/36544
@turkey758	ASUS P8Z77-M	Arc A770	16GB	Y	Resume from sleep works
@PeanutAria	GIGABYTE X470 AORUS GAMING 7 WIFI	RX 580 8GB 8GB		N	Latest bios (F63i) flashed using flashrom 1.2 without removing any extra modules
@linuskim07	MSI Z170A-S02	Arc A750	16GB	Y	Resume from sleep works. Motherboard already has Above 4G decoding features, just enabled and disabled CSM by enabling Win8.1/10 WHQL Support enabled.
@nuclearmistake	ASUS Prime X299-A	RTX 3090	32GB	Y	I had to flash by removing the CAP header (making it a ROM) with uefitool as outlined on winraid.level1techs.com/t/guide-how-to-flash-a-modded-ami-uefi-bios/30627 and then use afuwinx64.xe whatever.rom /GAN to flash. However, my flashback button does not light up when pressed, so I couldn't get flashback to flash the CAP.
@Mullin	ASUS Z97 Pro Gaming	RTX 3060 Ti	8GB	Y
@SebVig	ASUS Rampage V Extreme	RTX 3090	32GB	Y	Need to use MMTool method to avoid BIOS corruption #98
@ebkess2	MSI B250M MORTAR ARCTIC	Arc A770	16GB	Y	Had to change "Integrated Graphics Devices Configuration -> Initiate Graphics Adapter" to IGD because at least this MSI board wont automatically fall back to the iGPU if the UEFI fails to find the dGPU. Had to go into Device Manager in Windows and disable the iGPU or games that have XeSS (doesn't have to be enabled) will crash with varying errors in Event Viewer.
@cacafuti8888	ASUS MAXIMUS VIII RANGER	RX 580 8GB	8GB	Y	Resume from sleep works
@JamSWACD	ASUS X99E-WS	Radeon VII	16GB	Y
@Altair2009	ASUS Z170A	RX 6700 XT	16GB	Y	flash using afudos 3.0.4, pad issue with uefi patch have to use mmtool 5 (mmtool 4.5 cant save rom error)
@abarreraj	ASUS Gryphon Z97 TUF	Arc A580 8GB	8GB	Y	Resume from sleep works
@Ahriman0	ASUS Strix Z270F Gaming	RTX 3080 Ti	16GB	Y	Flashed using AFUDos
@iknightpl	ASUS B150M-PLUS	RX 580 2048SP	8GB	Y	1,there is no logo on system boot. 2, when set bar size is too small, It will cause system halt.
@notsyncing	Supermicro C9X299-RPGF-L	Arc A770	16GB	Y	Resume from sleep works. Though this motherboard has Above 4G Decoding and Re-sizable BAR options in BIOS, but the BAR size is only 256MB even after these options enabled. So this patch is needed.
@Balrogos	Asus PRIME B250M-K	RX 570 8GB	8GB	Y
@tumo07	BIOSTAR H310MD PRO (ver 6.x)	RX 6700 XT	16GB	Y
@Ross0907	ASUS A320m-K	RX 550	1GB	N
@zhiwoo	Dell Precision T5810	Arc A750 8GB	8GB	N	External EEPROM flasher required. Dell BIOS flasher would not allow the flashing of modified BIOS.

[BK8000L]

MSI B75ma-e31, ivy bridge i5-3330, rx 580 after applying ffs module i was able to increase the size to 1gb, "above 4g decoding" doesn't exist, "max TOLUD" (hidden) can be dynamic (default) or from 1gb to 3.25gb (setting to 1gb doesn't help), patches don't help. I did gpu bound benchmarks and there is no difference (256mb and 1024mb bar). thx anyway.

 

mod bios if someone needs it: https://drive.google.com/file/d/108Zg2MwYN-jCTm1Y-tr0T0X68o-XTb0l (rename E7808IMS.mod to E7808IMS.340)

[xCuri0]

@BK8000L You will only see improvements in DX12 games mostly and maybe very CPU bound DX11 ones. I haven't tested 1GB BAR but I got a 12% gain in Cyberpunk 2077 benchmark with 2GB BAR on my RX 580 8GB.

[BK8000L]

@xCuri0 can you test with 1gb bar? i tested in cyberpunk and superposition

[xCuri0]

@BK8000L you should use high or medium settings. When I test on ultra the difference is very small in Cyberpunk

[dsanke]

MSI C236M WORKSTATION Intel DG1 Don't need UEFIPatch. Not tested by myself, this motherboard with DG1 won't boot if without ReBAR support.

[scarface65000]

Hello @Koekieezz , could you explain me how you manage to enable 4G Decoding on GA-H77-DS3H got a similar MB GA-Z77M-D3H. GPU-Z say me "Above 4G Decode enabled in BIOS : Yes" without doing nothing but I don't see large memory range in device manager.

Thanks for your help

[xCuri0]

@scarface65000 the instructions to enable 4g decode are in the wiki which is what koekieezz followed

[Aushyro]

Hello I have a ASUS Z170-E and downloaded latest BIOS from their website. (Z170-E-ASUS-3801) I'm unable to find the string PciBus in this BIOS file. 4G decode was already visible in this BIOS so I enabled it and disabled CSM

[xCuri0]

@Aushyro try doing GUID search for CF8034BE in UEFITool. PciBus should show

UEFITool doesn't search LZMA compressed regions properly so this workaround is needed. I've updated the wiki to have it

[scarface65000]

@scarface65000 the instructions to enable 4g decode are in the wiki which is what koekieezz followed

Thanks for your reply @xCuri0, i was unable to enable 4g decode with your wiki explanation (i'm able to change setup_var (offset) but nothing happen) but I found in your wiki that's it's possible with AMIBCP. So I activate Above 4G and disable CSM for my firmware using your trick in failsafe and optimal mode. (preventive for error too cause i passed my 3 last day to recover my corrupted bios). I can confirm that this method working for me. (you can reuse my picture if you want to make the tutorial) And now I can see large memory on windows.

Now i'm at the step after the uefi patches.txt.

I am unable to make the DSDT patch

• i'm able to extract amiboardinfo module
• i'm able to extract dsdt.aml and the to decompile to dsdt.dsl
• i'm apply the modification for 36-bit ivy bridge 0xFFFFFFFFF
• but i'm unable to compile my modified dsdtmod.dsl extracted with UEFITool or UEFITool NE even if i leave the dsl untouched !

Any help could be appreciated.

Pardon my French ;)

[xCuri0]

@scarface65000 change ABCDEFGH to ABCDEFFF. Same error on my Gigabyte board and that fixes it

[Aushyro]

Default search does not seem to find anything. When I enable "Header and Body" I seem to find multiple instances, but not anything with the text PciBus. See attachment.

[xCuri0]

@Aushyro have you tried looking at each one ? One of them will be PciBus

[kpwsyang]

working on the ASUS H170M-PLUS with the PowerColor Red Dragon RX 480 8 GB, patched BIOS

At first it can't enable the ReBAR in the AMD driver by change the registry keys although it has enabled in the BIOS. For some reason the bus is place at the Bus 1 rather than Bus 0 so I need to change the entry of registry file from [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class{4d36e968-e325-11ce-bfc1-08002be10318}\0000] to [HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class{4d36e968-e325-11ce-bfc1-08002be10318}\0001]

Then it works. If someone has problem to enable the unsupported GPU in the AMD software also. Take a look at the registry, maybe it is the same problem.

[dsanke]

@Aushyro 8D6756B9-E55E-4D6A-A3A5-5E4D72DDF772 is GUID of PciBus of your BIOS. I recommend just insert it after A0327FE0-1FDA-4E5B-905D-B510C45A61D0, it will work. I have tested.

[brafLake]

ASUS EX-B150M-V3 COFFETIME 0.99 EDITED BIOS TO WORK WITH COFFE LAKE PROCESSORS QTJ2(i5 10400) PATCH ENABLED RX 6600M BAR SIZE 8GB REBAR IS WORKING GOOD.

[LordAdo96]

Hi there, so finally i managed to enable it! Ryzen 5 2600 RX 580 b450 aorus m I had to flash modded bios with your ReBarDxe.ffs and use ReBarState.exe to get it work. and after all that time i finally managed to do this, im proud of myself and you to get us this. Thank you pal.

[Aushyro]

Ok, so I really tried everything but I'm unable to POST.

What I did:

1. Enabling hidden 4G decoding : No, my BIOS natively supported this setting
2. Turned on 4g decoding and disabled CSM.
3. Adding FFS module to create a BIOS file using the GUID @dsanke provided. Everything went well!
4. Checked if I needed DSDT Patching : No
5. Applied UEFIPatch: Using UEFIPatch
6. Flashed the new BIOS using [Guide] How to flash a modded AMI UEFI BIOS. Using "Flashing an ASUS BIOS file with the extension “.CAP”:" / "2. Usage of an AMI AFUDOS or AFUWIN Tool:" method.
7. Did step 2 again.
8. Using ReBarState.exe tried to use 16g/8g and/or 4g. After setting this POST returned a long beep and 3 short beep, but I am able to enter Windows still (but without the rebar) (Except 4g wich gives me the most awesome ai generated I have ever seen haha (see attachment)). This also automagically enables CSM again.
9. Unplug GPU, using iGPU to boot, disable ReBar in ReBarState.exe using value 0.
10. Plug GPU in and reboot.
11. Repeat step 7 till 10 using different values.

I'm not really sure what to do anymore. Can you help me with this?

[edit]:

2g gives me the same AI art like in the screenshots, so not really bothering trying 1g or lower.

Also: CMOS reset does nothing for me, I have to physically inplug the GPU to be able to boot into Windows and using ReBarState.exe to disable ReBar and try again...

[xCuri0]

@Aushyro 1GB will probably work. It looks like the patch to prevent BAR being downgraded to 32-bit is missing.

Also you can probably set the BIOS to always enable iGPU so you won't need to take out GPU. It could be related to bug #4

[Aushyro]

@Aushyro 1GB will probably work. It looks like the patch to prevent BAR being downgraded to 32-bit is missing.

Also you can probably set the BIOS to always enable iGPU so you won't need to take out GPU. It could be related to bug #4

Thanks, but 1GB actually generated the same issue as in my latest 2 photos I've sent. Let me try to re-create the whole BIOS image and do the complete process again. I'm replying to a thread wich is not suitable for my issue btw, should I create a official Issue when this still is not working?

[edit]

AHA! I've made some progress! I've must been incredibly stupid. Yoohooo :D (claps hands with @xCuri0 ) Ok, no time to celebrate yet. As GPU-Z is showing the correct states, the driver is not. I tried already re-installing the AMD driver (including the factory reset option) but it shows that rebar is not supported. Going to try the DDU method now.

[edit2]

• Ok, I tried using DDU to remove the GPU driver -> still not working.
• Tried updating VBIOS to latest version -> Still not working.
• Disable iGPU again and connect all screens back to GPU -> still not working.

[edit3]

NOW I HAVE IT WORKING! I had to apply the register patch described here: Common-issues-(and-fixes) Yass, you can add this to the list haha :D

[edit4]

After all this Windows detected hardware changes wich made my Windows unactivated. So, I had to just re-activate my Windows :) just so you know that the

[limyz]

asrock h77 pro4-m is working. dsdt and uefi patching is required.

[RRM5]

First of all, thanks to @xCuri0 Hello everyone, let's see if you can help, AB350Gaming rev1 board, r5 1600AF, RX nitro 4g, this is the hardware. Something strange happens to me, I enabled bar with Above64 and it let me put up to 2g as I have read that it is normal, but in games it did strange things to me, sudden drops in fps and less fps, with 1024 and 512 it behaves the same. On the other hand, if I remove Above64 and put it in 1g, it works, logically with more than one gig it doesn't start. And it seems strange to me on a ryzen motherboard. I don't know what the problem could be and I would like to take advantage of that extra gig.

[xCuri0]

@RRM5 this sounds like a bug with your BIOS probably. maybe linux dmesg could be helpful.

also you could try the TOLUD thing listed in README to possibly get 2GB without above64

[RRM5]

@xCuri0

I tried with the stock bios and added only the Rebar, I modified many things, but nothing remains the same. I don't see a TOLUD bios. I wouldn't be surprised if it was a bug in the Gigabyte bios, my journey with this board is firecracker..... Thank you.

[xCuri0]

@RRM5 save the dmesg log to a file and send that. Do it while you have BAR set to 2GB

[RRM5]

@xCuri0 This is what I got , 1 y 2

Thanks for your help.

[xCuri0]

@RRM5 i think the problem is the BAR address being allocated for the GPU is higher than what is optimal. See if there's an option Above 4GB MMIO Limit including in hidden menu and set it to 39-bit. 39-bit is what Intel desktop platforms use and they don't have this issue

[RRM5]

@xCuri0 It's the first thing I unlocked from the bios, I tried but I don't remember if I tried Valos 39 then I'll see if it continues to do it, especially with Doom Eternal and it's weird because it's Vulcan and that's where it should work best bar, right? Thank you.

[xCuri0]

@RRM5 both vulkan and DX12 games are affected most by resizable bar

[RRM5]

@xCuri0 I don't know but it's weird, the MMIO value doesn't matter, it does the same, the weird thing is the freezing and a drop in FPS from 80 to 40 with a microfreeze, don't worry I'll leave it at above 64 disable and I'll settle for 1g which will always be better than 256mg. Maybe I'll try to remove the module from the board to see if it's going to be because of that, or try an older bios, I don't know...... Thank you very much for your attention and your work. Regards.

[xCuri0]

@RRM5 open a separate issue for this

[Rubio85]

Hello, On My Gigabit ga-ax370m-ds3h it works fine, only to know ist that you cant flash with the moddet efiflash 0.87 the new capsules Bios. You need this tool...https://winraid.level1techs.com/t/tool-flashrom-v1-2-dos-amd/36544 it works perfect. If you are interested, I can also upload my modded bios.

[Rubio85]

6070xt Bar size 16 GB UEFIPatch req (N)

[Briggzy125]

MSI Z170A pro working with a RX6650 XT, Tested 8GB Had to use MMtool & Patching was required

[newborn2010]

It's working with ASRockRack C621 motherboard. Here is WC621D8A-2T + RTX A4000

[rekh127]

Asus Maximus IX Hero (z270) working with rx 5700 XT

Using unlimited(32) in ReBarState correctly set to 8 GB.

Didn't try without patches - patches that were applied were "Don't downgrade 64-bit BARs to 32-bit (Haswell)" and "Remove <64GB BAR size limit (Skylake/Kaby Lake/Coffee Lake)"

Have an intel arc a750 on its way and will confirm support with that on this same motherboard when it arrives.

[23volot]

Hello, so i was able to make rebar to work but its only usable till 1024 mb My specs are : Motherboard MSI Z77A-G43 (MS-7758), BIOS V2.13, i5-3570, Sapphire rx 580 nitro+ 8gb (ignore 580x in the screenshot) Disclaimer: Before doing any modding to bios of this board, consider this:

• every attempt to use M-Flash (integrated bios flashing from USB) failed, bricking the board.
• the BIOS chip is soldered on the board, so you need a re-flow station, and preferably hot plate (or a good preheat) so you wont melt or destroy the psb.
• there is a JSPI1 connector that can be used to flash BIOS without soldering, but it requires a specific programmer, i tried to hook up rt809f programmer i use to flash BIOS - it did not work.
• the motherboard don't have any BIOS flashback functionality, so you are up for a lot of pain :)

So, i injected the FFS module using the MMTool method (the UEFITool method didn't work for me) the rebar function worked. Patched the image Using UEFIPatch and ended up using pad file issue workaround. So i got rebar working, but there is a major issue i could not work around yet. Right from the start GPU-Z stated that: Above 4G Decode enabled in BIOS Yes After i got rebar working i could not make it go above 1024mb. I started to investigate, and find out that Large Memory was absent in my device manner. I tried Enabling hidden 4G decoding but no luck. The most frustrating thing is that i did not find any BIOS setting stating that this board supports above 4G decoding. I dug through every BIOS available for this board using UEFITool and AMIBCP_v5.02.0031. And in every single one of them i couldn't find an entry for above 4g decoding. Either i failed miserably (its been a long day of soldering BIOS chips...) or MSI Z77A-G43 (MS-7758) BIOS does not have this option integrated, even in hidden options. Please, if I'm wrong, help me find solution for this issue.

If anyone wants the BIOS image, i can share it (i forgot it on the PC at the work place).

[xCuri0]

@23volot Currently there is no fix for missing 4G decode option. Alot of Haswell users also have this issue

You should still see a performance gain with 1GB though. Did you try the TOLUD method in README to try and get 2GB ?

[rekh127]

Another gpu tested with the Maximus IX Hero (z270)

Didn't realize I was supposed to grab photos last time. But grabbed them with the arc a750. Works the same here. Sleep and resume did work with both.

[Koekieezz]

Hello, so i was able to make rebar to work but its only usable till 1024 mb My specs are : Motherboard MSI Z77A-G43 (MS-7758), BIOS V2.13, i5-3570, Sapphire rx 580 nitro+ 8gb (ignore 580x in the screenshot) Disclaimer: Before doing any modding to bios of this board, consider this:

• every attempt to use M-Flash (integrated bios flashing from USB) failed, bricking the board.
• the BIOS chip is soldered on the board, so you need a re-flow station, and preferably hot plate (or a good preheat) so you wont melt or destroy the psb.
• there is a JSPI1 connector that can be used to flash BIOS without soldering, but it requires a specific programmer, i tried to hook up rt809f programmer i use to flash BIOS - it did not work.
• the motherboard don't have any BIOS flashback functionality, so you are up for a lot of pain :)

So, i injected the FFS module using the MMTool method (the UEFITool method didn't work for me) the rebar function worked. Patched the image Using UEFIPatch and ended up using pad file issue workaround. So i got rebar working, but there is a major issue i could not work around yet. Right from the start GPU-Z stated that: Above 4G Decode enabled in BIOS Yes After i got rebar working i could not make it go above 1024mb. I started to investigate, and find out that Large Memory was absent in my device manner. I tried Enabling hidden 4G decoding but no luck. The most frustrating thing is that i did not find any BIOS setting stating that this board supports above 4G decoding. I dug through every BIOS available for this board using UEFITool and AMIBCP_v5.02.0031. And in every single one of them i couldn't find an entry for above 4g decoding. Either i failed miserably (its been a long day of soldering BIOS chips...) or MSI Z77A-G43 (MS-7758) BIOS does not have this option integrated, even in hidden options. Please, if I'm wrong, help me find solution for this issue.

If anyone wants the BIOS image, i can share it (i forgot it on the PC at the work place).

MSi Bioses at that day have the wackiest M-Flash installs. The only guranteed way to flash it safely, is by making sure THE bios doesnt have any pad-file or any stock file, deleted at all. i managed to update the orom, efi gop, inject nvme, etc, by making sure nothing is deleted. then i tested it using m-flash, it works. The method is by make 1 copy and make sure everything is modded in the copy, open copy using mmtool, extract the module that you updated, then use replace function on the original bios. that works most of the time for that janky m-flash XD

[sears-s]

I have an ASUS Z170-AR with a 6600K. Prior to modding the bios, I could not get it to POST with an Arc A380 (VGA LED stayed on and Arc's fan stopped spinning after a few seconds). I modded and flashed the BIOS with the patches (thanks to @dsanke and @Aushyro for their helpful comments, PciBus would not show up for me either) and tried setting the ReBar to a few different values (unlimited, 1GB, 4GB). With the GPU attached, it is still not POSTing. Anyone know if this may be related to ReBar or if my CPU and GPU simply aren't compatible?

[xCuri0]

@sears-s Did you try CSM off (and any other legacy settings off too) ? And also enable 4G decode if you want to use rebar

It's not a compatibility issue multiple people have had Arc work on Skylake and Haswell

[sears-s]

@sears-s Did you try CSM off (and any other legacy settings off too) ? And also enable 4G decode if you want to use rebar

It's not a compatibility issue multiple people have had Arc work on Skylake and Haswell

Yes, I've had CSM off and 4G decoding on in the BIOS. What are the name of some other common legacy settings that could be causing the issue?

Maybe my card is dead... I'll play around with PCIe slots and power cables.

[pnrxtx]

Asrock z170 extreme4 with coffee mod 9700kf, 6800xt gpu. Unlimited(16gb) rebar size. No uefi patch. "Above 4g decode" is hidden in bios (0x385 offset).

Question is patch needed to make all 16gb available for rebar ? Maybe i don't understand this correctly, but it uses heap1 which is 8gb instead of 16gb heap2. Or how else i can see how much gb is used for rebar

[xCuri0]

@pnrxtx heap1 is shared memory (system RAM) not GPU VRAM.

Here is on my system

[sears-s]

I have an ASUS Z170-AR with a 6600K. Prior to modding the bios, I could not get it to POST with an Arc A380 (VGA LED stayed on and Arc's fan stopped spinning after a few seconds). I modded and flashed the BIOS with the patches (thanks to @dsanke and @Aushyro for their helpful comments, PciBus would not show up for me either) and tried setting the ReBar to a few different values (unlimited, 1GB, 4GB). With the GPU attached, it is still not POSTing. Anyone know if this may be related to ReBar or if my CPU and GPU simply aren't compatible?

Got it to POST after setting the primary display in my BIOS settings to the iGPU, which is fine for my use case. ASUS Z170-AR with Intel Arc A380. Here are some notes:

• Could not find PciBus string so inserted FFS after A0327FE0-1FDA-4E5B-905D-B510C45A61D0
• Ran UEFIPatch (used two patches but can't remember the names) but it created an extra pad file so used mmTool to manually replace the patch
• Used AFUWIN (https://winraid.level1techs.com/t/guide-how-to-flash-a-modded-ami-uefi-bios/30627) to flash the new BIOS

lspci output with ReBar disabled:

03:00.0 VGA compatible controller: Intel Corporation DG2 [Arc A380] (rev 05) (prog-if 00 [VGA controller])
    Subsystem: ASRock Incorporation Device 6004
    Flags: bus master, fast devsel, latency 0
    Memory at de000000 (64-bit, non-prefetchable) [size=16M]
    Memory at 2fe0000000 (64-bit, prefetchable) [size=256M]
    Expansion ROM at df000000 [disabled] [size=2M]

With ReBar size set to unlimited:

03:00.0 VGA compatible controller: Intel Corporation DG2 [Arc A380] (rev 05) (prog-if 00 [VGA controller])
    Subsystem: ASRock Incorporation Device 6004
    Flags: bus master, fast devsel, latency 0
    Memory at de000000 (64-bit, non-prefetchable) [size=16M]
    Memory at 2c00000000 (64-bit, prefetchable) [size=8G]
    Expansion ROM at df000000 [disabled] [size=2M]

[MissBendy]

MSI B150m Bazooka Plus UEFI Patch applied 7700K and 6600 XT

8GB works in windows but I had to lower it to 1GB for MacOS (hackintosh) to boot.

Edit: Looks like the current development version of OpenCore 0.8.9 adds in compatibility for this rebar mod

[pnrxtx]

@pnrxtx heap1 is shared memory (system RAM) not GPU VRAM.

Yea, its actually mismatch indexes where it says heap count and heap indexes lower. so its heap1=index0, heap2=index1, not heap1=index1 as i thought. So its using correct heap2 which is 16gb for me.

[xCuri0]

@RRM5 you might want to see this https://gitlab.freedesktop.org/drm/amd/-/issues/1864

[RRM5]

@xCuri0 Thanks, that's precisely what's happening to me. I don't know if there's any way to fix it by modifying something in the bios?for w11. These days I tried everything I could think of and nothing worked. I have resigned myself to not using a bar, although in Cyberpank 2077 I did gain about 4 or 5 FPS, but in others like Doom eternal I lost about 30 FPS. I said thank you very much and greetings.