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How accurate are the sensors on the A7V?

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Richard

Senior Member
Joined
Jan 15, 2001
I'm running a watercooled 1.2 GHz Tbird, and motherboard monitor reports 51 degrees celsius at boot up. Under minimal load it climbs to 53 degrees and stays there.

What the heck is going on? If I touch the waterblock is cool to the touch. Even the water is nice and cool.

Is there something I'm missing?

I am using Arctic silver paste.

Here's where it gets stranger. My Alpha PEP66 maintained temps just about equal, but the sink was notably warmer.
 

Nagorak

Senior Member
Joined
Dec 19, 2000
The main problem with the motherboard temperature sensors is they are on a secondary heat path. The motherboard itself acts as a secondary heatsink, which absorbs a lot of the heat from the processor. From my experience the heat sensor will be 5-6 degrees F hotter than your heatsink temperature.

You temps are about 10 C higher than mine, but you are also running 150 MHz faster. Then again you are also water cooling...

I guess I'd say that the motherboard heat sensor is completely inaccurate, and you should get a thermostat cable to check the heat level of your processor. Remember that Tbirds are spec'ed to handle heat up to something like 85C/195 F, so you're well within acceptable limits.
 
OP
Richard

Richard

Senior Member
Joined
Jan 15, 2001
Hmmm.. very interesting. I didn't mention it in my first post, but my motherboard temps are 41 degrees celsius.

Basically, my waterblock is trying to cool the CPU and motherboard.

Come to think of it. It is hot as the Sahara desert in here. (Louisiana.)

I'll turn on a few more fans in the case. (Tried turning off all case fans. Wanted to see worst case scenario.)



Nagorak (Feb 25, 2001 06:47 p.m.):
The main problem with the motherboard temperature sensors is they are on a secondary heat path. The motherboard itself acts as a secondary heatsink, which absorbs a lot of the heat from the processor. From my experience the heat sensor will be 5-6 degrees F hotter than your heatsink temperature.

You temps are about 10 C higher than mine, but you are also running 150 MHz faster. Then again you are also water cooling...

I guess I'd say that the motherboard heat sensor is completely inaccurate, and you should get a thermostat cable to check the heat level of your processor. Remember that Tbirds are spec'ed to handle heat up to something like 85C/195 F, so you're well within acceptable limits.
 
OP
Richard

Richard

Senior Member
Joined
Jan 15, 2001
Update:::

I made a WPCREDIT setting change, and temps started to drop quickly. It appears that the bios version (1006) does not sent HLT commands to the CPU.

I also got the motherboard temp down to 28 degrees celsius.

Now I'm running at 35 degrees celsius idle temperature.

Pretty big difference eh?

Couple of notables...

The water does warm up pretty quick. I'm just using a big reservoir. Probably should get a radiator and fan. Although, I was hoping a large enough reservoir would eliminate the need.

Also need to add some blowholes to the case. Without direct airflow on the motherboard temps go up pretty quick.
 

lehboy

New Member
Joined
Mar 9, 2001
How do you use that WPCredit Program to change the accuracy of the A7V?
i have globalwin fop38 installed with a duron 700...and idle temps range from 42-44C with 52 max full load....