Pentium 4 Prescott 3.0 (socket 478) overheating

avi85

Senior member
Apr 24, 2006
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I was at my friends place helping him with computer troubles and I installed MBM5 and saw that his CPU temp was 86 degrees so I immediately shut it down and opened up the case and saw that the heatsink was clogged with tons of dust so we cleaned it all out and now he idles at about 61 (load is like 66-67).

First of all I was wondering what is considered normal temperature (not the most it can handle just what's common with stock heatsink)

Second of all I was wondering at what temperature it starts to throttle itself.

Third of all when I tested load temps after we cleaned the heatsink I ran prime95 and for some reason it would only hit 50-55% in the performance tab of the task manager but in RMclock it showed cpu utilization at 100% and OS load at about 50-55%, what does this mean could this be some sort of throttling?

Last but not least, what kind of temps could I expect with a Scythe ninja, Scythe katana or the Arctic cooling Freezer 4, or any other suggestions you may have preferably under $30
 

Fanginc

Member
Feb 28, 2006
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I own an LGA 775 3.2 ghz and it used to overheat all the time when i was using the stock heatsink. my friend who ordered a dell computer with the same processor, they told my friend that if the process doesn't hit around 70's, its okay.

I am currently using the Scythe Ninja with a 120mm fan on it. It cools my processor to around 32-24 idle and aroiund 37 load. So its a good heatsink for me and i recomened it.
 

Neurorelay

Platinum Member
Jul 21, 2004
2,195
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My Prescott 3ghz 478 idels around 58c, full oad encoding around 78c; no errors and runs fine. It is just a very hot chip, especially in a case with no ability to support side fans.
 

F1shF4t

Golden Member
Oct 18, 2005
1,583
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I think pressies will shut down at around 92C. They will prolly start throtling past 80C.
I never owned one, had a choice to go between 3.2ghz northwood or a prescot, glad i chose the northwood.
 

stevty2889

Diamond Member
Dec 13, 2003
7,036
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86c is definatly too hot. Throttling kicks in around 72c at stock speeds.

Because of hyperthreading, you have to run 2 instances of prime95 to get 100% cpu usage. As for the Scythe Ninja, I'll tell you shortly..I just got mine today, since I"m tired of re-filling the water cooling on my 805.
 

F1shF4t

Golden Member
Oct 18, 2005
1,583
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Originally posted by: stevty2889
86c is definatly too hot. Throttling kicks in around 72c at stock speeds.

Because of hyperthreading, you have to run 2 instances of prime95 to get 100% cpu usage. As for the Scythe Ninja, I'll tell you shortly..I just got mine today, since I"m tired of re-filling the water cooling on my 805.

Maybe u should set ur water heating in the house through the 805 PD, sure would save money :p