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How Hot is Too Hot ?

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I have a P4 3.0 with 2x512 GB DDR, several harddrives on a Gigabyte mobo.

The system idles at sub 40 degrees celcius, but can rocket to over 60 when rendering video etc. I have an additional large fan stuck on the side of the case which blows in over the CPU/RAM, which I switch on during these intensive operations.

How hot is too hot?

14 replies

by willcomp

Is that system temp or CPU temp? Either way that's rather hot for a P4. High range for an Athlon CPU temp as well. If CPU temp, high but not to damage stage. If system temp, about 20 degrees too warm and bordering on damage area.

How many exhaust fans do you have and where are they located? Any fans on front blowing over hard disks?

Make and model of case would be helpful. Or a detailed description of cooling scheme.

Dalton

by willcomp

I agree with TheChas that a slot cooler in slot next to video adapter should help significantly. GPU can generate as much or more heat as does CPU.

They're readily available and cost less than $10.00.

Dalton

by etoile

2 exhaust fans.
May try slot cooler.
Cleaned dust out and seemed to make big improvement

by thechas

Sounds like the first thing you need is a more efficient CPU fan / heatsink.
If the top of the heatsink (near the fan is hot to the touch, you don't have enough fins or fan.
If the base of the heatsink (near the CPU) is not as hot as the CPU, you have poor thermal transfer.

I use power supplies with dual fans for any high performance system. This helps move the hot air from the CPU out of the case.

For case fans, while I opt for positive case pressure, I use fans with a thermal sensor. They speed up as the sensor gets hotter. That way, I don't need to remember to turn them on and they are reasonably quiet when the PC is idling.
You do want to nearly match airflow in to airflow out. More than a 10% difference in CFM in versus out can create a stagnant case.

Since you are doing video rendering, do you have a slot fan next to your video card?

Chas

by etoile

May try slot cooler.
Cleaned dust out and seemed to make big improvement.
Will investigate thermal transfer

by etoile

I have just a standard case. There is a fan over the hdds,
two exhaust fans on the back, a large blow-in fitted to the side of the case over the CPU & RAM. I have flat ribbon cables (not round). No slot fan next to AGP Video, but a free space. AGP video has own fan. Pinnacle DV500 capture card.
Doing video rendering and movie encoding.

Suspect case is a bit crowded. Things improve when side of case left open!

by ozi eagle

Hi,
A comparison. I have an AMD Athlon XP2700, running at about 2.2 GHz. Turned on about an hour ago and have only browsed this site. My temps are 38 deg C for system and 50 deg C for cpu. I don't know room temperature, but it feels pleasantly cool.

by etoile

CPU at 32 Celcius at the moment after case clean out! Weather cooler than when question asked, and appears to make big difference

by nerd32768

most non-overclocked P4s will run stabily at up to 80 defrees celcius. if you are rendering video, you will probably be using many advanced features of pentium 4 processors, and you will probably be using a good percantage of the processor's maximum performance

by etoile

THanks.
Hasn't got past 66 Celcius, but I was still concerned. Tried a few things above plus case dust cleanout. Thanks for reassurance!

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