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800MHz P3 with HS from 1GHz TBird - NO FAN

MichaelD

MichaelD

Lifer
Well, I guess I'm going to find out, eh? :evil:

I got my P3 800 ancient Dell running today. The original HS is long gone, but I had an old HS that came with a 1GHz TBird (remember those? 🙂). The fan was LOUD. So I unplugged it.

The Dell case (Dimension L800r) has a PSU with a high RPM fan. The intake for the fan literally is right on top of the CPU HS. The intake grill almost touches the fan for the CPU, that's how close it is. There is a good blast of coolish air coming out of the PSU. The CPU HS feels warm but not hot to the touch.

Running F@H on it 24/7. B/C the motherboard has an Intel 810e chipset, there is NO monitoring utility out there for it. I tried MBM and Speedfan. Nuthin'.

How long till it burns up?
 
The old P-III processors have a built-in thermal trip circuit. If the part reaches a certain temperature, it will shut off its clocks. It was designed to shut down prior to permanent damage taking place.
Running the CPU out of its temp spec but below the trip point will shorten its life, but I'd bet that you have a year or more before you see problems.
 
i dont know man, i have a tbird 1400 and it came with a very very crappy hsf. if you wanna run it without a fan id recommend getting a decent hs of today. theyre just so much better.
 
Well, after about 10 hours of F@H, the HS was almost too hot to touch. 😱 Could keep my finger on it for about three seconds.

/whistling

I honestly don't think it would last too long under these conditions. Gonna have to come up with something better...the little fan on the HS just screams.

I do have the HS from a 2500 Barton, but no fan for it. It's physically smaller than the HS I'm using now (the one from the TBird) but it's heavier and has thinner copper fins. Think that would be a better passive solution?
 
Yeah, it is a better HS. I'm going to move the CPU/mem/HD over to another motherboard/case. I want to see how the temps do in a bigger case. The mobo I'm moving it to (Iwill BD133) supports monitoring.

The little Dell is good what it was meant for; email and surfing, not number crunching.
 
If it's running already, it should be fine. Even the P3's had thermal throttling, so if it was overheating, it would slow down or shut down, without doing any damage. Our computers at work are P3's using passive heat sinks(not sure what speed they are, some older IBM aptiva's). I was doing some ram upgrades on them, and couldn't believe the dust built up in there, and the fact they were using passive aluminum heat sinks. I would think they'de have fried themselves long ago like that.
 
Originally posted by: BEL6772
The old P-III processors have a built-in thermal trip circuit. If the part reaches a certain temperature, it will shut off its clocks. It was designed to shut down prior to permanent damage taking place.
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Click to expand...

What he said. ^

Don't you remember the Tom's video from about 4 years ago showing the PIII w/o a heatsink?

 
It will likely go as long as it would have with the fan, I've seen counless P3's on my workbench that have had their fans seize and they run completely fine and even at reasonable temperatures
 
Yup, Tom's video showed a heatsink being taken off a P3. It basically locked up. I personally had a P3 700 overclocked to 933 which booted into Windows before locking - WITHOUT a heatsink. The system had been knocked over and the HSF fell off. Later, it was turned on and left running for over ½ hour. I came back to it and it was in Windows, but was locked. Turned it off, opened up the side and saw the HSF on the bottom of the case. :Q Scared me, but I put the HSF back on and it was fine.
 
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