Author Topic: CPU temp question  (Read 584 times)

Offline Smut

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CPU temp question
« Reply #15 on: May 14, 2002, 06:09:18 AM »
Having just built a new AMD powered (1900+) system, I've found those chips to run very hot. The CPU heatsink I started with was a Volcano 7, and I can't recommend this unit. The Volcano 7 has a variable speed fan controlled by a temperature probe. Sounds good in theory, the fan runs slower when the CPU is cool, thus producing less fan noise. In practice however, my CPU temps would quickly rise to my cutoff temp of 60 degrees C under load.

Why? Well the temperature probe for the fan is mounted outside the heat sink, and thus is not measuring CPU temp but case temp. My case is a Lian Li PC-60 USB, which provides very good cooling overall. Because the case temps were so low (under 30 degrees C), the CPU fan never ran fast enough to cool the CPU under load.

I tried moving the temperature probe inside the heatsink but  that  wasn't very successful. I solved the problem but cutting off the probe and hardwiring the fan to the full on position. That worked great, but was very noisy.

The ultimate solution was a new heatsink, the AX-7, with a Mechatronics 80x80x25mm Fan (Ultra High Speed) mounted on top. Got mine from http://www.coolerguys.com, along with a tube of Artic Silver 3 heat sink compound. Everything is nice and quiet now, I was even able to turn my case fans down a notch. Idle temps are 38 C and under load 45 C. The CPU is not overclocked, but my GF3 Ti200 is clocked up to ti500 levels.

Haven't flown the new rig in AH yet as it is USB only (Abit AT-7 MAX motherboard) and my Cougar hasn't arrived yet. It screams in Dungeon Siege though...

-Smut

Offline Pongo

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CPU temp question
« Reply #16 on: May 14, 2002, 09:13:41 AM »
I added 2 inport fans and an exaust fan. with the case closed , playing AH the cpu is now 51degrees. In windows its 45 degrees.
I think a better cpu fan might still be in order. And I would like to lower the noise rate a little... But its cooler now any way.
Thanks guys

Offline Sox62

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CPU temp question
« Reply #17 on: May 14, 2002, 10:48:53 AM »
Your temperatures are way better...adding a good HSF to the cpu combined with Arctic Silver may drop you as much as 10C more.

 Here is a link to reviews of HSF's at Tomshardware.

http://www6.tomshardware.com/cpu/01q2/010521/index.html


 And here is a link to where you can buy HSF's,Arctic Silver,and a CPU shim if you want to really play it safe.Very reasonable prices.

 http://www.1coolpc.com