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Getting conflicting 12v rail readings from different programs.

Hardware monitor after 1 hour of heavy gaming says the lowest my 12v rail got was 12.136, which is close to what the bios tells me as well. GPUz tells me my 12v rail with no load is 11.75 and under load drops to 11.5.

With the amount of power I'm pushing my GPU, I'm inclined to believe there is no way it dropped to 11.5 without crashing, but I'm not really an expert on this.

What do you guys think? Are the GPUz readings just flat out wrong?
 
All the voltage sensors in a PC are uncalibrated and of dubious accuracy; I wouldn't trust any of them. My motherboard is currently reporting 11.68V, while my (accurate) multimeter says 12.16V.

GPUz does not provide the 12V rail reading. Which tab?
It does if the graphics card has a 12V sensor and GPU-Z knows how to read it.
 
GPUz does not provide the 12V rail reading. Which tab?

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