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Confusing system/CPU temperatures

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libervisco's picture
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Joined: 2006-05-04

I've installed and set up lm-sensors and it shows temp1 at around 44C and temp2 at 26 to 30C (at most). If I remember correctly from before the temp2 is actually the CPU temperature and the temp1 is the system, but the opposite seems to make more sense when I look at the numbers.

I mean.. how can a CPU be so much cooler than the system?

The thing is, even the BIOS reports CPU temperature as about 30 and system at around 45.. totally weird.

So either something's fishy here, the temperature sensor is near a warm component (gfx card or something) or I don't know what. BIOS and lm-sensors can't both be lieing, right?

Did you ever heard of something similar happening or has it happened to you?

Thanks

tbuitenh's picture
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Joined: 2005-12-21
I don't know how this

I don't know how this works, but I think maybe lm-sensors asks the BIOS the temperature...? In that case, it would probably be a bug in the BIOS (it happens), and the solution would be to check if a newer version is available.

OTOH it is indeed possible the fans of the graphics card are aimed at the system temperature sensor. CPU temperature will always be higher than system temperature, since it is one of the main heat producing components.

In any case, 30 and 45 degrees are nice cool temperatures, so I don't think there's anything to worry about, it's just weird.

libervisco's picture
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Joined: 2006-05-04
Thanks Taco. I guess I'll

Thanks Taco. I guess I'll take upgrading BIOS into consideration when the F11 comes out. Here are the Gigabyte BIOSs for my board. Oddly enough, the last one (F11) which is apparently beta release names E6320 support. I have E6320 processor. Maybe this has some relation to the way BIOS reads temperature data...

We'll see, it'