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Please, Advice on getting into TEC / PELTIER CPU cooling.

post #1 of 6
Thread Starter 
Hello all,

I am currently set-up with full water cooling and I am looking to go further with sub zero on the CPU.

My water cooling loop equipment is as follows:

(1) 3 120mm XSPC RX radiator
(1) 2 120mm XSPC RS radiator
(1) Cape Cora HF 442 passive radiator

Equipment currently being water cooled in the loop:

AMD FX-8350 @ 5GHZ

TWO HD6990's ( QUAD GPU )

With this setup, the GPU with the highest temp during 95%+ usage on all 4 gpu is 70c.

The CPU core temps are 48c-52c during load.



Now with that.

I am looking to use a TEC on my CPU only, what TEC ( specifications ) do I need to get and will my current water cooling set-up be good enough to cool the TEC and GPU's ?

I'd want it for a 24/7 / daily use.


Thanks
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post #2 of 6
You're going to want a chiller most likely with atleast 2x 62mm TECs with 400Qmax. You're CPU will put out about 200W or more and no single TEC running at standard 12V will be able to handle that. That being said, each TEC will put out about 150W of its own heat, generating 300W total for both. I suggest getting another triple, or atleast another double radiator with push/pull config.

Reason I say a chiller is because it will perform better than a Direct Die because the full brunt of the cooling will be centered on the CPU, instead of having useless overhang on the CPU cooling the air.

EDIT: TECs are not great at hitting Sub-Zero with a fully loaded CPU, unless it's really low powered. TECs are classified as Sub-Ambient.
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post #3 of 6
Thread Starter 
I think I may try direct die first.

A single TEC would be sufficient then? 1 qmax 400 or less?
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CRUCIAL M4 256GB SSD DVD/BURNER WINDOWS 7 64BIT ASUS LCD 23" 
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CRUCIAL M4 256GB SSD DVD/BURNER WINDOWS 7 64BIT ASUS LCD 23" 
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post #4 of 6
If you ran it at about 18V or 19V it would give you around 20°C delta from the hot side; you would also be generating and needing to move about 400W extra with your watercooling. This is if you were using this TEC. If you are looking to run the TEC at 12V, you will use about 168W for 290W Qmax with 0 difference between hot and cold side. With your CPU at those clocks, you're looking at best 13°C or so less than water temperatures.

If you thought of using this one if you run it at 12V, it will give you 294W of power used (heat generated) with about 255W Qmax with no difference between hot and cold side. You would be looking at 13°C below watertemps also with your CPUs clocks at full load.

The first TEC will generate less heat at 168W (vs 294W on the second TEC) which will dump less heat into your watercooling (which is a good thing). Less heat generated means there's more room in your water cooling, which means water temps won't get as hot...duh...

You are aware that you can't just sandwich a TEC inbetween a waterblock right? If not I'll explain but I don't feel like typing it out if you already do. Everything about TECs is custom work. Unless you order from Mindchill.

Above are about the only viable TECs that you could use in a Single TEC Direct Die. Anything else is too less.
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Whitey!
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post #5 of 6
Thread Starter 
It's a good thing your here smile.gif

I was going to sandwich it between cpu and the cpu water block.

Please give me more info, I really would appreciate it. I already know I about the condensation part and insulation is a must.

More info about Mindchill would also be great, website?
Edited by yappy - 12/1/12 at 3:18pm
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CPUMotherboardGraphicsRAM
AMD PHENOM 1090T @ 4.2ghz GA-990FXA UD5 2X SAPHIRE 6990 G.SKILL 16GB 1600 
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CRUCIAL M4 256GB SSD DVD/BURNER WINDOWS 7 64BIT ASUS LCD 23" 
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My System
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CPUMotherboardGraphicsRAM
AMD PHENOM 1090T @ 4.2ghz GA-990FXA UD5 2X SAPHIRE 6990 G.SKILL 16GB 1600 
Hard DriveOptical DriveOSMonitor
CRUCIAL M4 256GB SSD DVD/BURNER WINDOWS 7 64BIT ASUS LCD 23" 
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LG BRAND , CHEAPY CORSAIR AX1200 ROSEWILL MODIFIED LOGITEC MX518 
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ICEMAT 
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post #6 of 6
A TEC transfers heat evenly across its surfaces. With the TECs I showed you, they are 62mm x 62mm, where a standard CPU Die size is < 20mm x 20mm. The Die is where all the heat is generated and it will be placed smack dab in the middle of a TEC. So only ~ 1/3rd of the TECs actual cooling power will be used. Also, a waterblock is intended to cool the center of a CPU, which means if you used a CPU waterblock to cool a TEC, only the middle would be efficiently cooled, and also, the corners and the edges of the TEC would be uncooled as it would be larger than the waterblock. You need to evenly cool the hot side of a TEC to keep it from breaking down, and you need to distribute that cooling power of the cold side by placing some copper or aluminum between the CPU and the Coldside.

Mindchill is a guy on the forums here who makes TEC Direct Die Waterblocks and Liquid to Liquid chillers. He is a bit busy at the moment, and his site is down, until the first of January, maybe even later. He's trying to get caught up. His website is Arqtik.

His username of the forums is Mindchi|l.
Whitey!
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Whitey!
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II x6 1090T BE Crosshair IV Formula HIS Radeon HD 5870 2GB 4x2GB Corsair Dominator DDR3-1600 
Hard DriveOSMonitorKeyboard
Corsair 32GB SSD, Seagate 1TB, Western Digital 1TB Windows 7 Ultimate SyncMaster 245B and SyncMaster 2343 Logitech G15 v2 
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