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Will this do for a 226w pelt?

post #1 of 7
Thread Starter 
Is this mini psu good enough for a single 226w peltier?
http://www.fsp-group.com.tw/english/...=133&proid=529

btw, will a 226w be enough to cool a g80 pretty good?
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post #2 of 7
Both no.

You need a high(er) voltage PSU than that to let the peltier cool enough.
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post #3 of 7
Thread Starter 
k, what psu would you recommend? And how big pelt should you use on a g80?
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post #4 of 7
You would need a special PSU for it, not just an ordinary computer PSU.

I guess about 437 for a G80.
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post #5 of 7
A little info about pelts. Seeing as most are rated for 18V, you'll never get that full 226W of cooling power. Also, most power supplies don't have heavy duty enough wiring to handle the power going to that pelt. Finally, you'll need either water cooling or phase along with the pelt, as the pelt will generate heat equal to whatever its cooling power is (it is just a mini refrigerator after all). Most people don't use pelts for those very reasons. What sounded like a $20 attempt to chill your hardware to sub-zero temps now becomes several hundred dollars that still might not be 100% reliable. If you're still thinking of it, Pinhead and Tuchan know more about it than most people do. Pinhead and Tuchan both use 437W pelts running at 9V through a seprate variable PSU.
post #6 of 7
Just some info for you.... the 8800GTX TDP is 177w while the 8800GTS is around 140w. Of course, this is the TDP for the entire card so the core TDP is probably lower. On the other hand, overclocking will increase heat. That means you will need at least a 250w applied TEC to see any real benefit. Also, there are more components on the G80 to cool than just the core and memory. There's the I/O chip and Danger Den mentioned a total 26 components.
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post #7 of 7
Hmm... Getting a waterblock to work on a pelt on the G80 would be a real bear. I don't think it'd be possible with anything less than a CNC milling machine and a workshop.

However, that being said a 226w pelt would probably be close to enough considering the power output of the card. Getting that pelt cooled, however, would be tough without a completely custom waterblock.

I run a 437w peltier on my X2 3800+ at 13.5 volts to get -25°C idle temps. 5 volts would give me about 15°C idle and 28°C load temps. The 437w peltier draws 25 amps at 24 volts, and about 15 or so amps at 13 volts. You need a pretty hefty supply to power a big peltier at effective voltages.

Read the stickies to learn in more detail effectiveness vs efficiency when it comes to pelts.
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