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Dual P3 -450's

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freeloader1969

2[H]4U
Joined
Dec 13, 2003
Messages
2,238
Does anyone know if P3 - 450's need active cooling or can they be cooled by passive cooling? I have two P3 450's that I want to use in a file server and the P3 450's didn't have any fans on them when I bought them. They do however, have huge aluminum heatsinks on them. It appears that no fan was ever installed on them at all. Thanks for any help.
 
You'd need a large 120mm behind the cpu's or a fan shroud over the cpu's. I built my girlfriend a system with dual Katmai P3 550's. The board only allows an overclock of 618mhz, but coupled with 1gb of ram and an ATA/100 controller/hdd its a pretty quick system.
 
My old Katmai 500 ran real hot without a fan, but if you're using the 450s in a file server, you may be able to get away with passive cooling. But like acascianielli said, a large 120 mm fan blowing air on the heatsinks or good air circulation is really recommended.
 
The P3 450 doesnt need a HSF. They stay pretty cool with case fan blowing over them. I tried running a P3 550 without a fan because I thought it was the same and it burned up. :p
 
Thanks for the timely replies guys. Judging by your advice, I'm going to run a 120mm fan over them just to be on the safe side. Thanks again.
 
Like they've all said, my experience is that you don't NEED a fan, but they will get pretty damn toasty without one. (blame it on the huge .25 micron process and a whopping 2.0V vcore) I have a Katami 550 that will hit over 70C load without any ambient fan airflow. But I have a regular 80mm case fan behind it which keeps the temps down to about 50C load.
 
I wish I could get ahold of those sweet as Katmai 600's ::drools:: :D

I'm trying to find a matching set of Coppermine P3's for her board. I got a 667, 733, and 866 and am waiting for another of any of them.
 
acascianelli said:
I wish I could get ahold of those sweet as Katmai 600's ::drools:: :D

I'm trying to find a matching set of Coppermine P3's for her board. I got a 667, 733, and 866 and am waiting for another of any of them.
Click to expand...

I have dual 667 Coppermines in my file server and they do a great job on speed. Good luck finding a match. :cool:

Mr.Dearthian
 
You can run them passively IF you have excellent case cooling, and a fan passes air over the two CPUs. There are IBM servers at my work that are dual PIII 500's, and have only large heatsinks with one 120mm fan blowing over the two CPUs.
 
Josh_B said:
You can run them passively IF you have excellent case cooling, and a fan passes air over the two CPUs. There are IBM servers at my work that are dual PIII 500's, and have only large heatsinks with one 120mm fan blowing over the two CPUs.
Click to expand...

We have a few where I work with dual 933's passivly cooled.
 
OK....one more question. I don't know if this is the place to post it, but my 120mm fan is damn loud and must move a mountain of air. Does anyone know what type of resistor I would use to run the fan at about 10volts. I tried the 5 volt line and it won't even budge. I also tried the 7v mod and the fan won't spin up. I figure 10-11 volts should move the fan at a decent speed while keeping things cool enough.
 
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