cyring

3950X : CpuPwrSampleTimeRatio = 0

Discussion created by cyring on Jul 8, 2020

Hello,

 

Using a Ryzen 9 3950X ; calling CPUID Fn8000_0007_ECX[31:0] to read CpuPwrSampleTimeRatio returns zero

 

Thus the following formula from the Architecture Programmer Manual can't be applied:

 

N = CPUID Fn8000_0007_ECX[31:0]

 

PwrCPUave = N * Jdelta / (Ty - Tx)

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