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Question about Pelt/TEC

post #1 of 10
Thread Starter 
I'm tryin to debate whether I should go with a water block or a TEC direct-die cooler. I have a couple questions though.

Since TEC makes one side of the cold plate extremely cold and the other side extremely hot, how is the heat from the hot side dissipated? If the water cooling is supposed to dissipate it, wouldn't it raise the overall temperature of the water so as to be ineffective to cool anything else?
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post #2 of 10
Quote:
Originally Posted by this_barb
I'm tryin to debate whether I should go with a water block or a TEC direct-die cooler. I have a couple questions though.

Since TEC makes one side of the cold plate extremely cold and the other side extremely hot, how is the heat from the hot side dissipated? If the water cooling is supposed to dissipate it, wouldn't it raise the overall temperature of the water so as to be ineffective to cool anything else?
You need cooling on the hot side.. I would recomend a TEC cooled with the actual water cooling, then you can get a nice TEC and get near 0 temps..
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post #3 of 10
Thread Starter 
Ok, another question then.

What kind of WC components would you need to apply TEC to the CPU and a block to the GPU? I was thinking about getting 2 BlackIce Extremes (the 2 pass, single 120mm radiators) and putting them in the loop consecutively.
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post #4 of 10
Quote:
Originally Posted by this_barb
Ok, another question then.

What kind of WC components would you need to apply TEC to the CPU and a block to the GPU? I was thinking about getting 2 BlackIce Extremes (the 2 pass, single 120mm radiators) and putting them in the loop consecutively.
I dunno, i dont have too much experience with anything water-related.
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post #5 of 10
Thread Starter 
Darn, I need to know what kind of WC setup I'll need to sufficiently cool off a Peltier with a Qmax of 437W.
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post #6 of 10
I'm running the Winstch Labs 437W TEC and it idles at -25°C and full-loads at -8°C. I'm using a Hydor Seltz L35 and two heater cores. I don't think you could cool anything else in the loop, however, unless you've got another TEC (for, say, the GPU). That's -25°C at 13 volts (the pelt is rated at 24V).
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post #7 of 10
Dual heater core(s) are a much better choice than BIX's. If cooling something else in the loop (altho not recommended, as Pinhead-227 said), I would route it so the other cooled component precedes the TEC. Even then, TEC temps are going to be slightly affected, but if you've got said component getting hot water from the TEC, then temps will be worse than air.
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post #8 of 10
Exactly. Dumping in 437+ (+ because we take into account the heat given off by the processor) Watts of heat is going to heat up your loop quite a bit. I wouldn't reccomend doing any other block than the CPU becaues it does add so much heat.
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post #9 of 10
You have to realize, though, that you can "turn down" that 437W TEC to a pretty low voltage and still get sub-ambient temps without adding an appreciable ammount of heat on it's own. The lower the voltage you run the TEC, the more efficient it is. In other words, I'm going to run my 24V, 437W peltier (on my CPU) around 5 volts. That'll give me about 30°C load temps. Then I can get another TEC for my GPU and give it a little more voltage to keep the temp down. I plan on getting my GPU sub-zero while leaving my processor at "normal" watercooling temps without having two separate loops and pumps. That way I can figure which will give me more performance, CPU at negatives or GPU at negatives.
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post #10 of 10
Gotcha.
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