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Conflicting Temps: 7VRXP BIOS vs. Sandra

W

walla

Senior member
I was previosly using a Gigabyte 7VRXP Rev. 1.1 motherboard which had a design flaw with its voltage regulation circuitry. In order to get around that, I had to boost my VCore up +10% in order to get my video card to work with stability. The CPUT temp, (with the side panel off and next to an AC vent in a ceiling fan ventillated room with the door open... 🙂) was reported about 52C Idle 57C at load, in both the BIOS(v4.0) and in Sandra Software.

So then I swapped with a Rev 2.0 which fixes the voltage issues. However, 15 seconds after cold boot, I read the BIOS temps and they started at 52C. In about 10 minutes, they stablized at 60C. However, Sandra Tools report what I would have expected, temperatures in the low 40C's.

I am running the voltage at spec. I was EXTREMELY careful applying the thermal paste to my AX-7 (like my 4th time with this thing) and I'm sure the heatsink is on correctly, fans blowing the right directions and all that. When I shut off my computer, the heat sink is warm, but more like a hot summer warm as opposed to burning up at 140C warm (which could point to poor conductivity I suppose...).

I am curious - how does Sandra Software measure the motherboard temperature? Can this thought to be accurate regardless of the BIOS temperature reports? It would not surprise me at all if for some reason the BIOS was reading the temperature with a +10C offset for some reason. But I cannot truly tell. How can you tell?

If anyone has ideas, i'd like to hear them. Thanks.
 
Ok now this is weird...

My in-Windows temperature readings (with MBM and SiSoft Sandra) are fluctuating up and down, between 40 and 45 degrees. Refreshing every second gives a different result. The BIOS reports a good 60C idle...

What could be the issue here??
 
Well hmm... in case anyone cares...

I think the BIOS temps were correct. I pushed firmly down on my HSF and rebooted the computer on its side, and the temps when down about 9C. And the heatsink was warmer, meaning it wasn't making great contact with the CPU.

I think the sensors on this motherboard are screwy. I figured out that the temps it was reading for the AUX/HD temps were actually my CPU temps in SiSoft Sandra. ANd perhaps the fluctuating temps I was getting for the CPU temp were the AUX temps...

Anyone else run into the same issue?

Hopefully this is the issue. I think I need to work on the cooling a bit more 🙂
 
First, if you have bad contact between HSF and CPU, it is most likely that your CPU is toast. Second, the bios might be reading from the internal diode while the other stuff are not. The Diode tends to be hotter. I an not sure why your temp fluctuates so badly, but my MBM temp fluctuate between 2 degrees when I used it.
 
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