EVGATech_DaveB
Yeah TEC's give off a TON of heat. In some of the higher end TEC coolers I have seen, the hot side is run on a full size waterloop to keep it cool.
There was someone in the forums a couple years ago who had a bunch of crazy TEC builds, I believe he said he was military and had learned some of it there. But I remember him being really knowledgeable, had some TEC cooled HAF932 that was modded like crazy for a 24/7 build.
Another source for how-to's aside form those who are normally in this thread is Lehpron, that guy knows his stuff.
@Hallowen
How many SS's do you have? Or was this not meant for your normal 2-4way SLI setups? I know you have a chiller for the cards already, if you are getting to the point of sub ambient cooling on the so you have to insulate, then why not crank the temp down on the chiller? I don't know which you have but MANY can go sub zero, have you tried pushing it with the chiller?
You do have me really thinking about the SS on multiple cards though, really unique idea.....trying to think of a way to do it, it would definitely take some custom hardware., But if there is one thing I have learned over the years of computers, cars, and other hobbies, almost nothing is impossible.
First of All, I will agree 110% that lehpron DEFINITELY Knows All about TEC's as I was informed Years ago when I started my "Get it Colder" Thread using a 790i and a 400W TEC for CPU Cooling.
And Yes, I do have four used ASETEK Phase Change Units that could be used in a 4-Way SLI Cooling arrangement, But that's just me thinking out loud again.
This time I was just messing around with the Chilled Water/TEC combination as a method of Graphics Card Cooling, But found it was very insufficient in trying to Cool WAY too much Heat (The 400W TEC + 250W of the GTX 480) to even get NEAR the lower Temps that I could obtain with just Chilled Water Cooling, So My thanks goes out once again for lehpron's help using his mathematical theories/Facts and suggestions he had previously explained and after I was able to consider and work with them once again, The probability of using this TEC Graphic Card Cooling idea has been sidelined!
I think you could use multiple Phase Change units on multiple Graphics Cards using PCI-E ribbon cable Extenders such as were used in Mining Setups, But even after thinking about running another four Phase Change units that would require yet another higher Amperage capability rework of my present electrical home power panel, I concluded that trying this method would currently not be "in my best interests", LOL!

I'll more than likely keep using my Chiller to get to colder temps than I have been, Which by the way I will be trying Just that on some Slightly Older Graphics Cards I managed to buy at a very good price recently.
You know even though I've been using mainly EVGA Components for Years, I Do like to try different Components occasionally, Such as when I recently went from an EVGA X99 Classified to an ASUS Rampage V Extreme using my four EVGA GTX 980 Classifieds which I sold earlier this year, And Now I have decided (After Having some Memory Flashbacks of my EVGA GTX 295's in Quad-SLI) I am going to attempt to use my "GPU Only" Water Blocks and install them on My Newly Acquired Pair of RADEON R9 295X2 Graphics Cards after removing the BARELY adequate Factory Stock Closed Loop Cooling System (The ASETEK Pumps/Water Blocks and 120MM Fans/Radiators) and for Giggles and Grins, See What Happens when using these in a Quad-SLI Setup with Chilled Water Cooling to try and prevent the High Temperature GPU Throttling problems which IMO was the Reason that was hindering these Cards from being Overclocked very high due to the "estimated" 425W Power Draw and resulting temperatures at Stock Clocks they each put out in their Factory Cooling Configuration and of Course I'll also have to use another one of my Hercules 1600W/110A Single Rail PSU's dedicated to just powering the Two RADEON Graphics Cards on Top of the Main Hercules 1600W PSU used for the RVE MB/5960X CPU/Hard Drives/Corsair DDR4 and Other System Components.
(Those previous above statements should answer any questions about People wondering why I build "Open Air" Benching Rigs and don't Install my Systems in an enclosed Case!

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Why am I doing this You may ask?

.........Because I Always Love a Challenge as You Well Know.