PCH

InfoSeeker

Well-Known Member
Am I incorrect in assuming there is only one PCH on a motherboard?
I seem to be picking up two very different sensors.
pch.jpg
 

Martin

HWiNFO Author
Staff member
Yes, only one PCH. The seconds (higher) value is the internal temperature, the other one most probably a diode close to the PCH placed by the mainboard manufacturer.
 

Zach

Well-Known Member
I also have 2 Chipset temp readings on my board in HWiNFO‘s sensors with ~20C difference. In BIOS’s smartFan section there is only one reading about PCH and it matches the lower one. I also confirm it with board software by vendor (Gigabyte) that the reading in BIOS and the lower one in HWiNFO is actual what the board “sees” as PCH temp.

I read on another Tech forum that the other (higher) reading could be some voltage regulator of chipset power rail(s) but this I cannot confirm.
 
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