Core voltage

[DragonTamer1]

I have a Xeon 1650 running at 4.7GHz and CPU-Z is saying that it is only being fed 1.36V, however when I look in CPUID HWMonitor the motherboard is reading CPU VCore as 1.47 and CPU VID as 1.366. Which of these is the actual voltage that my CPU is receiving? In the BIOS the setting should not be feeding the CPU more than 1.37V except on startup where it is allowed to go up to 1.45.

[tom_w141]

Set manual voltage in UEFI then see what Cpu Z says.

 

I'd trust Cpu Z I have heard instances of hardware monitor being wrong.

[FAQBytes]

I would trust CPUID more than CPU-Z as it's distinguishing between VCore and VID, but there have been mentions of it being occasionally incorrect years ago. It may still be true, but I'm not following overclocking nearly as much anymore. If you want a second opinion, check out HwInfo64.

http://www.overclock.net/t/665362/vid-voltage-identification-explained

 

That doesn't seem out of the ordinary, however, as the VCore exponentially increases with increased clock, but I think you may have accidentally increased core voltage higher than what you intended. 

 

I saw an E5-1620 running at 5GHz stable at 1.456v running cinebench, and it's the same series, just with 4 cores, so when you add the 2 additional cores, with nearly the same frequency, it's not out of the realm of expectation. 

 

[DragonTamer1]

So I had set an offset voltage of +0.6V in the BIOS to allow for more dynamic voltages when the processor is under different loads. In the BIOS it only gives the current voltage at the time, not the current maximum. I was reading the 1.258V as that was the max the CPU was getting.

 

I have since set it to 1.377 and managed to squeeze another 100MHz out of the CPU across its scale.

[Spudbilly]

7 minutes ago, DragonTamer1 said:

So I had set an offset voltage of +0.6V in the BIOS to allow for more dynamic voltages when the processor is under different loads. In the BIOS it only gives the current voltage at the time, not the current maximum. I was reading the 1.258V as that was the max the CPU was getting.

 

I have since set it to 1.377 and managed to squeeze another 100MHz out of the CPU across its scale.

Awesome ?