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mihic / linux-intel-undervolt

Guide to linux undervolting for Haswell and never Intel CPUs
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cannot read or write MSR 0x00000150 #3

Closed miku86 closed 6 years ago

miku86 commented 6 years ago 
$ sudo apt-get install msr-tools
$ sudo rdmsr 0x150
rdmsr: CPU 0 cannot read MSR 0x00000150
$ sudo wrmsr 0x150 0x8000001000000000
wrmsr: CPU 0 cannot set MSR 0x00000150 to 0x8000001000000000
$ sudo wrmsr 0x150 0x80000011F9A00000
wrmsr: CPU 0 cannot set MSR 0x00000150 to 0x80000011f9a00000

i5-3320M Ivy Bridge Ubuntu 16.04 LTS

mihic commented 6 years ago

From the disclaimer:

This is applicable to all Intel CPUs with an integrated voltage controller (FIVR). In general this includes all mobile Haswell and newer CPUs. I only tested this on one machine, a laptop with a i7-6700HQ.

I will try to make that sentence clearer, but Ivy Bridge is NOT supported.

miku86 commented 6 years ago

Thanks and sorry for not getting this information.