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Old 05-14-08, 10:16 PM   #1
Falkon
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Can't get CPU temp down

On my desktop PC, it's idling in the bios at 73C. Once I boot into linux, it's already throttling my CPU due to heat. Windows works the same way. I tried applying new heat sink compound and sticking a large fan on the side of my computer. I'm thinking I'll go get another compound tomorrow and try that. The case has plenty of fans.

Here are the specs:
P4 3.6GHz
Intel heatsink with fan
Cooler Master case with plenty of fans

I really just can't get the temp down, and I can't play any games like this at all.

Any ideas?
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Old 05-14-08, 10:18 PM   #2
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Any ideas?
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Old 05-14-08, 10:35 PM   #3
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already tried that one. Maybe I should cover it in toothpaste.
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Old 05-14-08, 10:38 PM   #4
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How is the actual heatsink? Make sure it isn't gunked up with dust. Remove the fan and check the fins and have you made sure the fan is actually working? Maybe buy better fan/heatsink?

I have a new 12cm fan on my cpu - runs at 33C
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Old 05-14-08, 10:38 PM   #5
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Liquid cooling looks awesome.
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Old 05-14-08, 10:39 PM   #6
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What paste did you use?

Many require a long time to set. I use Arctic Silver ceramic because it sets quickly. Too much paste can also cause heat issues.
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Old 05-14-08, 10:39 PM   #7
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Cap'n, she needs more heatsink!

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Old 05-14-08, 10:40 PM   #8
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Stick it inside a minifridge turned all the way up. That might work.
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Old 05-14-08, 10:41 PM   #9
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dust? one leg on the heatsink loose?
heatsink sitting on capacitor instead of CPU?
too much thermal paste?

I remember the intel heatsinks having poor plastic legs for the mounting and the after market heatsinks would sometimes sit on the capacitors.
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Old 05-15-08, 12:04 AM   #10
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blew all the dust out. It's still possible that one of the legs where it pushes through the motherboard isn't letting it sit properly.

Another thing is that I can't find a 3.6GHz P4 on the intel site. This thing might be overclocked, since I got the motherboard/proc used a while ago.
N/M, it's a P4 660. They made those in 3.6GHz.

Damn damn damn
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Old 05-15-08, 12:36 PM   #11
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I just bought a BIG ASS HEATSINK. I know the P4 runs hot, so I probably really needed it to begin with. If this BIG ASS HEATSINK doesn't work, then I'm out of options.
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Old 05-15-08, 12:52 PM   #12
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It's also possible that the BIOS is reading the wrong sensor and thinking it's the CPU...
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Old 05-15-08, 12:56 PM   #13
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Heck I did not even know that computers had rectums.





wait for it.
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Old 05-15-08, 06:34 PM   #14
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Water cooling? I've never messed with it, because I fear that one crack in a hose and there goes the system, but I've heard of people swear by how a water-cooled CPU sink can keep the thing under 38 degrees (C) no matter what they do on the CPU.
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Old 05-15-08, 06:43 PM   #15
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Make sure that you use a thin layer of thermal paste when you mount the heatsink. I like the arctic silver instructions.

The prescott line of processors did run hot. I'm not sure if yours is a prescott but it seems likely. One of the best heat sinks you can use is the tuniq tower. If that can't keep your system cool, nothing except water cool can!
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Old 05-15-08, 07:01 PM   #16
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You need one of these:


Along with a 6000rpm fan.
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Old 05-15-08, 07:47 PM   #17
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Water cooling? I've never messed with it, because I fear that one crack in a hose and there goes the system, but I've heard of people swear by how a water-cooled CPU sink can keep the thing under 38 degrees (C) no matter what they do on the CPU.
only if you cool a Pentium D/E type, those leak so much heat you'd think an incandescent bulb was more efficient. Even then, water cooling on D/E would only get you average 40~45c idle

not worth the time and money for current processors. Overkill for C2D and Athlon X2. I think the water cooling on my X2 is overkill.
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Old 05-15-08, 07:50 PM   #18
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Where is the processor in relation to the fans.. Height wise?

Check to see that there is an open convection path from the processor to the fan.

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Old 05-15-08, 08:21 PM   #19
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Make sure that you use a thin layer of thermal paste when you mount the heatsink. I like the arctic silver instructions.

The prescott line of processors did run hot. I'm not sure if yours is a prescott but it seems likely. One of the best heat sinks you can use is the tuniq tower. If that can't keep your system cool, nothing except water cool can!
The strange thing is the heat sink I plopped on the Core 2 Duo chip I bought last week when building a server had no heat sink grease with it, nor instructions to put any one... just drop the chip in, close the frame around it, jam the heat sink on the chip, and mash the four corner fasteners down. However, it seems to be working... the CPU is at about 38 degrees (C) however the CPU is pretty much idle other than for I/O operations.
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Old 05-15-08, 08:35 PM   #20
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Using the stock fan with the crappy stock thermal paste (tape, really), my Athlon 64 X2 idles at about 30-35 degrees (up to 60C under heavy load). Only reason I didn't use some Arctic Silver was that I was too lazy to clean off the stock stuff. I'm planning to eventually replace it with the largest fanless heatsink I can find, so I'll Arctic Silver it then.
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Old 05-15-08, 08:54 PM   #21
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Using the stock fan with the crappy stock thermal paste (tape, really), my Athlon 64 X2 idles at about 30-35 degrees (up to 60C under heavy load). Only reason I didn't use some Arctic Silver was that I was too lazy to clean off the stock stuff. I'm planning to eventually replace it with the largest fanless heatsink I can find, so I'll Arctic Silver it then.
Is there any real difference in cooling between Athlon 64s and Core 2 Duo/Quads? To me, if the chip supports the critical instructions (virtualization, etc), I don't care if its Intel or AMD.
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Old 05-15-08, 08:56 PM   #22
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If the stock HSF isn't cooling it and it's probably installed with a proper application of heat paste...something is wrong.
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Old 05-15-08, 09:01 PM   #23
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Is there any real difference in cooling between Athlon 64s and Core 2 Duo/Quads? To me, if the chip supports the critical instructions (virtualization, etc), I don't care if its Intel or AMD.
Supposedly Athlons used to be quite a bit less power hungry than Intel chips, but I don't know if this is the case any longer.
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Old 05-16-08, 08:55 AM   #24
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The heat sink fixed the problem. I went from 60-70C idle to 38C idle. The computer runs much much better now.
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Old 05-16-08, 09:49 AM   #25
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holy moly, 60-70 C. That's pretty hot. I don't know what's normal for computers though
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