My Prescott system is too darn hot!

[Sentential]

Do you know what revision your prescott is? If its a C0 that would be the main cause. N0, E0 and D0 Prescotts really arent that bad.

 

[MQ]

I would NOT trust Corecenter at all. Totally BS readings . With a friend of mine, when you restart, corecenter jumps by 7 degrees (C) up

I dont know about that because I get the same readings in my bios...

 

[PlatinumGold]

Originally posted by: AnnoyedGrunt
OK, once again, the CPU temperature does not reflect the amount of Energy (HEAT) it generates!

Energy (HEAT) and Temperature are NOT THE SAME.

A good heatsink will keep the processor cool, but in order to do so, it is dumping the heat into the surrounding air at the same rate a small heatsink will.

If your processor is using 100W, you will be heating your room with 100W, no matter how big or small your heatsink. If your processor uses 75W, you'll heat your room with 75W, no matter how big the heatsink.

Also, a bigger heatsink does not heat the room faster, because you are still heating with the same amount of energy. All the heatsink does is change the temperature of the CPU. You are always dissipating the same amount of energy.

For conductive heat transfer, the amount of heat is expressed by:
q=-k(T1-T2)
(T1 = temp 1)
(T2 = temp 2)
(q = heat)
(k = thermal conductivity of heatsink)

So, your CPU heat is always q, and your CPU temp will be determined by the conductivity of your heatsink (k). No matter what though, you are always dissipating the same amount of heat.

Now, one other thing to consider is your monitor. If you have a large CRT, it is probably contributing a significant amount of energy to the room as well. If you have an LCD, then the cpu/gpu are the places to look.

-D'oh!

i'm not sure who this post is in response to, but i stand by my claim that a better heatsink will dissipate more heat into the room than a poor heatsink, especially in context of the OP which i didn't feel the need to repeat.

the OP has claimed that at non OC'd speeds he is stable but when he starts to OC his system goes unstable due to heat. having a better heatsink will allow him to maintain higher OC'd speeds, hence more heat will be sent into his room.

therefore, altho a better hs will enable him to run his PC oc'd it still doesn't resolve his problem of too much heat in his room.

amd 64 chips do run SIGNIFICANTLY cooler.

 

[MRKnight]

I'm a new user here. I found this site because a Goolgle search turned up this thread.
I also have a Prescott, a 660. The 6 series do not run much cooler than the 5 series, I can barely tell the difference. I had serious heat problems too and decided to do 2 things:

Passive water cooling takes care of the CPU die temp as well as reducing the case temp. Reduces the CPU temp great, doesn't do much for the case. My 120mm exhaust fan was still blowing too much hot air into the room and with the addition of the external cooling radiator (almost 2 square meters surface area) all the heat was still IN the room causing my A/C to kick on too much. It came on maybe 45 minutes out of 60 just to maintain 72F ambiant temp. The radiator fins measured about 98F which is one way to KNOW the liquid cooling is taking care of the CPU.

To remove as much heat as possible from the room I vent it. The radiator has to stay in the same room, otherwise I'd have water lines in places I don't want them. Best solution here is keeping the radiator by the A/C unit and having a quiet fan blow over the fins. Having the fan blow over the fins has reduced the A/C run time to less than 30 minutes out of 60. Heat is still in the room but now not concentrated on the radiator. This just leaves the case exhaust. My idea here is to get 10 feet or so of 120mm plastic flexible duct. I will stick it on the case right at the exhaust port and route the ducting out the window. The A/C unit is alreay in the window so it's easy enough to cut a 120mm hole in the "skirt" between the unit and the window frame. This will route a lot of the heat out of the room. I know this works because I've done it, but now I need to go back and do a more professional installation.

So with the water cooling and venting I have a cool(er) running overclocked Prescott that does not heat up my room too much.

BTW - I included a link to this newest PC.
http://home.comcast.net/~knight75/Hydra/Hydra.htm

 

[TGS]

i'm not sure who this post is in response to, but i stand by my claim that a better heatsink will dissipate more heat into the room than a poor heatsink, especially in context of the OP which i didn't feel the need to repeat.

the OP has claimed that at non OC'd speeds he is stable but when he starts to OC his system goes unstable due to heat. having a better heatsink will allow him to maintain higher OC'd speeds, hence more heat will be sent into his room.

therefore, altho a better hs will enable him to run his PC oc'd it still doesn't resolve his problem of too much heat in his room.

amd 64 chips do run SIGNIFICANTLY cooler.

A better heatsink will not generator more heat. Unless you have a peltier on it, in which case the peltier is generator the additional heat.

The heat coming from the CPU is a finite value. Whether or not the heatsink is doing an adequate job cooling the cpu, the cpu is trying to conduct as much heat as it can through the IHS. The heat is geting dumped into the case whether through the heatsink or the IHS, or reflecting back into the processor area. The overall effect is still increasing the room temperature, which is the problem the OP is stating.

My room gets a bit hot for my tastes with my a64, though that is a problem with poor ventilation. I usually run with my ceiling fan on, along with one door open. I think that if I fiddle with my AC system, I could direct in more cool air, but the fan works well for me. YMMV

 

[ender11122]

I had a Prescott core Celeron D running at almost 4ghz on WC. I thought it was sweet until it got warm in IL. It heated up my room at least 10*F!!!!! And I have a BIG room.

 

[stevty2889]

I have a D0 3.4ghz. As you can see(in my sig) it's water cooled..the reason being that even the XP-120 with a 120mm 78.6cfm fan and artic silver 5 couldn't keep it from throttling at stock speeds..Prescott was pretty well named after a city in Arizona..

 

[mechBgon]

For the time being, I would try to concoct some type of manifold that ducts all the case's exhaust out a window or something. Got a dryer vent maybe?

The guys pointing out the irrelevance of the size of the heatsink are correct. If the CPU is producing 100 watts and the heatsink is so small that it's only dissipating, let's say 80 watts, then the temperature of the CPU will simply begin rising until the temperature delta between the heatsink and the CPU is great enough to drive the full 100W across the resistance of the thermal interface (other factors being constant). Heat can't just not go anywhere without something happening.

I may have failed ChemE after 3.5 years, but I do remember basic scientific principles of heat transfer