cooling an overclocked prescott

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Wieland

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Jun 14, 2005
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Hi, I have a pentium IV Prescott 3.0E overclocked to about 3.8 gighz on an abit ic7-g. I'm using a Zalman 7700-cu heatsink/fan to cool it but the temperatures still range from about 60 idle to 80 under load. I know Prescotts were manufactured to run relatively hot and though my computer is running stable, can this persistant heat cause long term damage that could eventually affect the processor's performance? I have a couple of friends who told me that this was so, but I thought I'd come here for a few more opinions before I decide to sacrifice the speed boost.

thank you
 
If your getting 80C load, then I would do a couple things

1st. Update your motherboard bios cause hte temp probe is incorrect cause your CPU cant be running @ 80C. Im not positive on which temp your prescott throttles on the 478 chip, but I know the 775 prescotts throttle @ either 72 C or 67C dependin on which rev you have. If your chip throttles @ 72 C then ur bios is 8 C off, but thats still way too hot. I would do everything possible to cool that CPU, long term @ this temp will casue damage ir not just shorten its lifespan

I would install a program called throttle watch and see if your chip is throtting. I think this is the case, so your chip isnt running as fast as you think it is when its under load. I would either get a stronger cooling, or push the OC down a notch or 2. Sry for this news.

If your chip isnt throttling then ur bios temps are even more off, and you might be OK. Just if hte chip is bouncing off the thermal throttle you need to add cooling. Maybe try to remount the heatsink, apply some AS5 to it if you dindt already, make sure you put a small dot of it in the middle of hte CPU then install the HS

What Vcore are you running though it?
 
it's the middle of the night here, but I just saw your reply... I already remounted this heatsink 2x using as5. It doesn't seem to make a difference. From what I can see, the cpu isn't throttling at all. As for the bios, it was recently flashed. I'm a little pissed off b/c I just got this heatsink thinking it would bring the temperature down a little bit--no such luck. It does the same job as my old cheaper coolermaster.
 
So do you think maybe the temperature I'm getting is slightly inaccurate... or... I guess I should have posted this on the overclocking section. I appologize, I'm new here. I could just wait and see if my cpu burns down--it's been running like this for about 2 months now--that's why I got the new heatsink.
 
IC7's and IS7's both read temps higher than actual. My IC7-G reads temps between 8-12C higher than actual. There is a bios update that fixes it somewhat, on the IC7's it reduces the gap in prescott only, and on the IS7 it is corrected completely.

If you are running at stock or near stock voltage, and keep the temperatures within normal range, you shouldn't have too much trouble with the processor. Keep in mind there are other components that can fail and may fail faster with an overclocked system i.e. motherboards, memory.

I have yet to use a Prescott so I'm not sure on normal temperatures for them. I'll be getting my Celeron D system running in a few days and if you still haven't gotten your question solved I'll update.
 
Have you tried using the Throttle Watch program http://www.panopsys.com/Downloads.html

Run this program as you run a program like prime95 to load up your CPU when its running @ 100% then watch the throttlewatch and see if its throttling.

To run prime95 on a hyperthreading cpu. u need to run 2 instances of prime liek this

shortcut 1: "C:\Program Files\Prime95\Prime95.exe" -a0
shortcut 2: "C:\Program Files\Prime95\Prime95.exe" -a1

This will allow you to run 2 prime95s @ the same time. Your mobo is known to give bad temps. It appears on the abit site, that bios 24 and newer are suppose to have Calibrated the temperature sensors. Just make sure ur running either this or newer. If its stable and isnt throttling then its prob ok to run @ those temps. I just dont like seeing CPus that hot when ur OCin since ur pushing the CPU and the mobo and other components on the system. The excess heat that ur generating might not be great for everyting else.

What Vcore, chipset voltage, and ram voltage are you running?

Dont worry if you feel like your question is "noobish" this is what these forums are for to get help and give experiences that we've had.
 
Wieland said:
So do you think maybe the temperature I'm getting is slightly inaccurate... or... I guess I should have posted this on the overclocking section. I appologize, I'm new here. I could just wait and see if my cpu burns down--it's been running like this for about 2 months now--that's why I got the new heatsink.
Click to expand...

Your chip will not burn up. It will shutdown first.
 
ok, here are my basic stats
MBM.jpg
 
Ok ur not pushin much voltage. What does throttle watch show u when u r running 2 primes? Do the toture test. max heat the middle one.
 
My system is sigged; I've got a Swiftech with a 92mm Panaflow and when I game / enocde video, I've seen the CPU core temps (as read by the IC7) approach the mid 70C levels on these warm summer nights.

I've ran throttlewatch, and have never seen any with my system. My $00.02 is that if the CPU isn't slowing itself down, you're probably still in the safe zone.

Regards - B.B.S.
 
2primes and no throttle:) great! oh, and I just installed an air-conditioner. That brought my temperature down about 5-10.
thanks
 
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