miyconst / Mi899

Tool set for Chinese X99 motherboards
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Uefi boot barely works on JingSha X99M-H2 #45

Closed fish7221 closed 3 years ago

fish7221 commented 3 years ago

I've flashed the JingSha X99M-H2 motherboard with "X99M-G2 Miyconst optimal" and also tried the "TU FFS -50/50mv", But on both bioses my 970 evo nvme 1TB boot drive wasn't detected as UEFI drive so there was no windows boot manager to boot from. Rarely it detected the drive correctly and booted via windows boot manager mode (After resetting bios to defaults many times and rebooting the system about 20 times, and then on the next boot it didn't recognise the drive correctly again). I tried enabling/disabling CSM and then when CSM enabled - tried UEFI only - But no go. Finally booted via winPE (Strelec) and flashed it to original dumped bios and now UEFI works consistently. The tried bioses seems to have some UEFI implementation bug.

miyconst commented 3 years ago

This is a known issue of many Chinese X99 motherboards. Unfortunately, there is nothing I can do about it. If you are interested to get a better BIOS without this issue, you can contact BIOS-iEngineer.

If you want to just resolve the current issue, you have a few options:

Or perform the following steps, which may or may not help:

fish7221 commented 3 years ago

Thank you very much for the detailed info.