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Peltier + Corsair AX850

post #1 of 7
Thread Starter 
Guys,

I want connect 2 TECs in AX850 Corsair to have sure they are always on with the computer.

The TECs are TEC-12712 (15,4V @ 12A = 184,8W). I will use 12v @ 12A = 144W, the 8 pin PCI-EX (150W max) connector should be enough for each TEC.

The PCI-EX 8 pin diagram is:

1 - YELLOW +12V
2 - YELLOW +12V
3 - YELLOW +12V
4 - BLACK GROUND
5 - BLACK GROUND
6 - BLACK GROUND
7 - BLACK GROUND
8 - BLACK GROUND

I'll make a custom 8 pin PCI-EX female connector.

My doubt is, I should wire together the 3x +12V for positive and 5x GND for negative?

Thanks a lot!
post #2 of 7
im pretty sure that one of the pins on the 2 pin extension of the 6 pin is +12v i would check with a multimeter first before wiring up the peltier so you dont fry your PSU
post #3 of 7
Surprisingly enough, they really are both ground. The 8-pin only has two additional ground pins over the 6-pin.
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CPUCPUCPUCPU
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Intel Pentium G3258 Intel QX9650 AMD FX 4300 Intel E2140 
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post #4 of 7
A 6 pin connector has 2 grounds 2 +12V, 1 sense and 1 not connected. With a 8 Pin you have 3 grounds, 3 +12V, and 2 sense. Sense 1 is the ground that is in the same row as the +12v and sense 0 is the ground above the middle +12V

In order for a PSU to let a pin connector to give the full 125W you must ground BOTH sense pins. If you only ground sense 0 then you only get 75W. If you only ground sense 1 the you have a non support confiuration and who knows what might happen (More than likely the PSU designer was lazy and only checks sense 1 so you will get 125W).

In the real would this equates to the pin have 3 +12v on a single rail. So you can tie them together without any ill effects. Though it is good to remember that a 6 pin connector doesn't require the middle +12V pin, and while it may have the same number of pins as a pin, most PSU's with over current will trip if you try and draw over 75 watts from just a 6pin.

Here is the Offical Pinout:
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post #5 of 7
Thread Starter 
Quote:
Originally Posted by xxbassplayerxx View Post

Surprisingly enough, they really are both ground. The 8-pin only has two additional ground pins over the 6-pin.
Quote:
Originally Posted by ionstorm66 View Post

Here is the Offical Pinout:

Thanks for the help!

Once everything is ready, I'll post some pics.thumb.gif
post #6 of 7
Thread Starter 
After a long, long, long time... and a couple of house, jobs and PC changes, I finally have time to testing the peltier.

Yep ... are just 2x RAMs water blocks from my X99 build with 2x peltiers in between.





I put the guetto chiller after the second radiator and mount another loop in the botton (another D5 + Swiftech MC-320 and 3x ADDA 38mm Fans + Meanwell 320w power supply)

PS: Because it's a test, I use flex tubing with quick connects on the second loop to speed up.

At night, I post the results.
post #7 of 7
http://www.overclock.net/t/1522183/soundless-devil/780#post_25741031
Hey man might want to look at my build log. To Run peltiers chilling the water you need allot of radator and allot of peltiers running at half to a quarter of the maximum voltage
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