What temps can I get with a 50 watt Peltier on my P3?

[Madcowz]

Say if I put a 50 watt Pelt on my socket P3700 and connect my renegade coldplate to the hot side of the pelt, what temperatures for the CPU should I expect? The coldplate uses active cooling and my guess is that it would keep the hot side about 35C. If the the DeltaT Max is 65C, than wouldn't that make my CPU -30C? I doubt it would be that cold, but just thinking about it makes me giddy. Can anyone shed some light on this?

 

[Madcowz]

READ MEEEEEE

 

[eia430]

Madcowz, I would do a little research on how much heat(watts) your PIII produces then assume that if you're OCing it it will produce quite a bit more. I don't mean to throw water on your parade but a 50watt peltier might be a tad on the small side. I think most of the peltier cooling kits out there use 70watt or higher peltiers for PIII's. And for your second question no, you would not have a -30 degree cpu. The delta T rating of peltiers are usualy measured under no load on the cold side and max sink on the hot side. The delta T rating is usualy the Max no-load delta T that pelt can achieve. The delta T with load, especialy near max load will be considerably less, much, much less. If you are going to go with pelt cooling I would suggest just buying a proven solid kit. Issues of condensation are a pain to deal with on your own. The possibility of expensive mistakes makes just buying a proven/tested kit a bargain. Good luck on your cooling adventures.

 

[Madcowz]

yea but is 52 watts sufficient for a socket P3? I'm not sure how to calculate that heat disappation stuff so I'm not quite sure what I'll need for it. I don't think I have enough power to go around with a 70 watt pelt as my PS is already almost fully loaded; hell I sure hope it can take another 52 watts. Let's assume I'll be running my P3 at 1.7 volts at a very high speed... will that be less heat disappation than higher voltage at the same speed?

 

[eia430]

Hmm, I don't know how big (watt capacity) your PS is. But the 52watts you're talking about with the peltier is most likely the amount of heat in watts that it can move. You'll have to look at it's amperage draw amps * volts = watts to get it's wattage draw. I have a few friends with peltiers and I'm pretty sure all of them run the pelt with it's own power supply unless they have a monster (400-450watt)PS. Look at the manufacturer's website of your pelt to check it's draw in amps. If you're running your PIII at 1.7v then you're definately running hotter than normal. My best guess would be that PIII's will normaly need to disspipate around 35ish watts, if you are running higher voltage then you're probably darn close to 42ish watts. That might already put you real close to seeing nill to no benefits of using a pelt. Plus if you ever loose power to or don't supply enough power to the pelt you can send your cpu to fryville. Get a pelt cooling kit that has everything already with instructions for about $35. It's not worth risking your PIII to a project that you're unsure of. Turn that 52watt pelt to a kick ass single can beer cooler or coffee keep warm thing. Go with a 70+watt pelt kit for your PIII, and save yourself the headache.