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Can I use passive cooling on a P233
- Thread starter DaWiper
- Start date
- Joined
- Nov 23, 2003
- Location
- Toronto, Ontario, Canada
Why can't you just get a quiet fan for the heatsink instead of possible ruining your CPU?
- Joined
- Dec 28, 2001
Yes. I had an old Dell with a P200 that came from the factory with a large heatsink with no fan. It worked fine.
As listed at Sandpile.org, typical power for the P55 is less than 10 watts. Far less than any modern CPU.
As listed at Sandpile.org, typical power for the P55 is less than 10 watts. Far less than any modern CPU.
- Joined
- Aug 24, 2003
- Location
- Netherlands
lol, put a nice big HS on it, and itll be -55°C while being passivly cooled lol!
- Joined
- Oct 27, 2002
- Location
- Las Vegas, NV
I have a K6 300MHz that was sold passively cooled and still works fine to this day and the psu fan was the only fan in the entire system and that thing isn't even loud either. But I don't use that machine anymore, it is just to slow. I'm betting you could do the same with a cheap hs for you 233MHz cpu.
- Joined
- Mar 11, 2003
My P3 500 is passive, straight from gateway this way.
Runs a bit warm, but then I added a case fan it cooled it back down.
Runs a bit warm, but then I added a case fan it cooled it back down.
I use diodes to lower the voltage on my fans. A 1N4001 diode will shave .7v off and a 1N4002 (which I use because I can't get the 4001's locally) will shave .3v off of your fan's 12v. I run 5 in series and lower the voltage of my heater core's fan to 10.5v and it's a lot quieter. You can see in the pic below what I've done.
#1 is where the mini molex (for floppy drives) connects to the board
#2 is the jumper that lets me choose between full voltage or full voltage -1.5v
#3 is the output for the fan
#4 is a jumper for the molex's 5v line just incase I need it for something else
It'd be a lot simpler to make a circuit like that that doesn't have as many diodes and doesn't need the jumper part. Just splice into the live feed for the PSU's fan and solder inline two or three diodes, you don't even need a circuit board for that. Make sure you heatshrink the whole deal though, you do not want a short in your PSU!
#1 is where the mini molex (for floppy drives) connects to the board
#2 is the jumper that lets me choose between full voltage or full voltage -1.5v
#3 is the output for the fan
#4 is a jumper for the molex's 5v line just incase I need it for something else
It'd be a lot simpler to make a circuit like that that doesn't have as many diodes and doesn't need the jumper part. Just splice into the live feed for the PSU's fan and solder inline two or three diodes, you don't even need a circuit board for that. Make sure you heatshrink the whole deal though, you do not want a short in your PSU!
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- Joined
- Mar 11, 2003
That seem slike kidn of a pain to do that, While it may be more expensive, I'd just get a fan controller.
You can run a p233 with no fan. I had a p233 that had a tiny heatsink with a 40 mm fan on it. The fan died without me knowing about it a long time ago. It hasn't overheated, and it has remained rock-stable. Earlier this year, it had an uptime of 6 months. (it went off during that big blackout). So, there should be no problems at all as long as there is some sort of heatsink on the thing.
- Thread Starter
- #13
Here's the heatsink I intend to use(without the fan)
http://www.computerhq.com/hardware/partinfo-id-6820.html
This should do?!
http://www.computerhq.com/hardware/partinfo-id-6820.html
This should do?!
- Joined
- Jul 3, 2003
- Location
- hunting wolverines
that cooler should be more than enough, like it says above, a Pentium 1 won't put out very much heat. The northbridge on most modern boards probably puts out about as much heat as an old pentium.
I've had several passive cooled P1-233. The Slot-1 P2-233 however was harder to keep cool.
So before I say, YES you can, I would need confirmation that you are talking about the old Pentium 1 - 233.
Is it with or without the MMX? The MMX series grow warmer though. But it should not be an issue.
Cheers, Flix
So before I say, YES you can, I would need confirmation that you are talking about the old Pentium 1 - 233.
Is it with or without the MMX? The MMX series grow warmer though. But it should not be an issue.
Cheers, Flix
- Joined
- Nov 30, 2002
- Location
- California
my friend has a huge copper passive heatsink on his althon tbird 1.3ghz with on case fan blowing air out.
run about 55c and he doesn't mind
if it can be done with a 70+watt CPU, then it can be done with a ~25watt cpu like urs, lol
run about 55c and he doesn't mind
if it can be done with a 70+watt CPU, then it can be done with a ~25watt cpu like urs, lol
- Joined
- Nov 30, 2002
- Location
- California
ok i'm a moron, my 450mhz data/pinter server computer has a stock passive heatsink on it, only psu fan, stock from toshiba, been running for years like that so if it can do it a p233 can fo sho
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- Jun 5, 2003
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- TEH INTERNETS
eobard said:
The 1N400* series are all bog-standard silicon rectifiers - the number after the 400 bit is just the voltage rating. A silicon PN junction always drops 0.7V, so that ain't right. 1N4002s should also have a forward voltage drop of 0.7v. The only types that have drops lower than this are Epitaxial or Schottky barrier diodes, and even then they are 0.5v.
Good idea to use diodes though...
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