CPU temp.

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twist

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I've been using the stock cpu cooler that came with my PIII 933. It was cheap, and very loud. It stuck out like a sore thumb after I installed a new Enermax P.S.(very quiet!). So after much research, here's what I found.

The efficiency of the cooler (heatsink) is very important. The less eficient your cooler, the more airflow you need to keep the temp. down. The more airflow, the more noise. A larger size fan like an 80mm can provide more airflow at a slower rpm than a 50 or 60mm, and with less noise.

So I was looking at larger heatsink fan/combinations, and found several good combinations, but guess what? I'm using a mini tower case, and the cpu is right under the P.S. They were all too tall to fit. Plus I wasn't too crazy about having all the weight of a two lb. cooler hangin off the mobo horizontally.

Eventually, I found a uniquely designed unit that seems too work pretty well. It's very small and light by comparison, and is nearly silent (18db)! The difference is in the design of the cooler. Instead of a big aluminum heatsink, it uses a solid copper 1" cylinder with a radial fin attachment, and a small 3800 rpm fan on top. With a little modification, I was able to mount sensing thermistor right down in the center of the core which was hollowed out. I believe this placement will also give a more accurate picture of the actual cpu temp because of its proximity to the cpu, rather than having it stuck out on the outer edge of the cooler. If your in a similar situation, this could be a good solution.
Here's a pic. http://www.endpcnoise.com/cgi-bin/e/00015.html?id=U5VrUyLp

Also lots of good quiet fans at Plycon, and Sidewinder. they even have comparison charts with mp3s so you can hear how they sound.

My only question is, What should be the normal cpu temp, and where is the "Red Zone"?

FYI

Twist
 
40 - 50C is typical. 60 - 70C could reduce the lifespan of the chip a few years. :D
 
check out the program "motherboard monitor" it's free. Most motherboards have a cpu temperature sensor and a case sensor built in. Although it's nice to have one on the video card Gpu and your hard drives. I dropped a nice copper heatsink on my cpu and it dropped temps by 10c. No only do high temps reduce the lifespan of your components (which really sucks for hard drives) but it can cause system instability and file corruption. Most people don't realize a lot of crashes occur because of high temps. Nub's suggestion: Get a full tower case. Install motherboard monitor. Sisoft Sandra. Prime 95 and a memory testing program. I have a digital readout on the front of my computer with temperature probes attached to my hard drives, Gpu and two to sense case temps. (the motherboard has a built in cpu sensor) Loop your machine for 24 hours or so with Prime 95. How hot does your stuff get? Loop your hard drives. How hot do they get? Loop your memory, etc. Get proper airflow through your case. Usually I intake at the bottom and outake at the top. (heat rises) check your cm2 rate for your fans. Make shure they add up at the intake and outake. It all sounds anal retentive but I can say my computer hasn't crashed in almost a year. I've gone over to peoples places to consult and they'll have their computer near a heat vent and full of cracked software and then they blame microsoft or apple for their computer crashing.
 
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