View Full Version : Chilled water help needed
08-26-05, 09:46 PM
I have the recently started watercooling the computer in my sig and have not got the results I want. I need some advice on chilling the water w/ a tec and what I could expect for temps.The system is running high 40's loaded now.I am currently thinking about putting some kind of waterblock w/ the tec mounted to it be4 the cpu waterblock to chill the water right be4 it gets to the cpu. Is this a good idea?
Is there someplace better to try and cool the water? I have bought this (http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=6792567285&sspagename=ADME%3AL%3ARTQ%3AUS%3A1) and plan on putting the tec on that outside of my case, insulating it and the tubing running to the cpu block.
08-26-05, 09:51 PM
1 water temp doesn't change much in the loop
2 you must power a tec
3 you must cool a tec
4 the tec must be strong enough for the job
better off putting tec on cpu
As crimedog said, you'd be better off putting it on the CPU directly. In most cases, TECs are rather cooled BY a water system instead of cooling the system itself. If you decide to cool your loop with a TEC, you will need a good way of cooling it as those suckers usually get fairly hot. I have a few small ones about the size of a Zippo and when they heat up, they're too hot to touch. Just something you might want to consider.
The TEC also would need a solid contact point at which to cool the water, and which I'm not so sure would be easy to come by. A TEC is optimal for cooling a CPU because of it's inherently flat surface(s), which make excellent contact with a CPU die.
08-26-05, 10:22 PM
Sorry for being so vague I have a two tec's one is going on the cpu and I wanted one to try and cool the loop. Because the tec's are identical watts I cannot stack them. I am using a pyramid 12v 30amp power supply and a huge heatsink to power and cool the tec's. So basically even trying to cool the loop w/ the other tec is pointless? I just figured more cool to the hot side of the tec on the cpu would be better. But if I would just be spining my wheels by trying to cool the water and wasting power then maybe some1 could point me to an alternative?
Edit: I have a link in the first thread to a waterblock I have click on the word THIS
08-26-05, 10:38 PM
Alternative would be to get a waterblock that uses both the TECs on the CPU.
something like the maze2-2.
08-26-05, 10:48 PM
Maze2-2 eh how much would one of those cost?
08-26-05, 10:55 PM
cooling the tec loop with the same tec is the same as stacking them
also, don't they demand about 20a each?
08-26-05, 11:10 PM
Well I figured running the one on the loop would not need as many amps to cool because it will be under a lesser load maybe 10amp and the one on the cpu pulling about 18 they are both 226watt. From what I have researched the smaller the load the more efficient tec's get at cooling and use less power. Ls7corvette do you link where I could find one of those maze2-2? I have looked on the dangerden site and they do not sell them anymore or I am just blind and didn't see it.
08-27-05, 12:14 AM
I would use the block you bought with ONE TEC only. Use a cold plate sandwich with the cooler you just bought, place the tec between the two, and be sure to insulate everything outside and under the CPU, since a 226 watt TEC will pull temps down to at least condensation level, if not freezing, and leak water all over everything.
As for what you were thinking of doing, ive tried it, and it doesnt give you any noticeable performance.
Consider that under optimum conditions, water will remove about .25ºC per minute. The TEC setup you plan would add more heat to your water cooling loop, and since you state that your temps are already in the 40ºc/110-114ºf range, I estimate your only getting maybe 65-75% efficiency from your current setup. This means your water cooling setup may not be able to keep up with both the CPU and the heat produced from the TEC.
MAKE DARN SURE YOU DONT HOOK UP THE TEC BACKWARDS OR INSTALL IT UPSIDE-DOWN! I fried a good athlon T-Bird 1200 that way, and only in the time it took for bios to post on an abit kt7a.
You must have had a damn powerful Peltier. :p
The ones I have take about 3 minutes to reach temps. hot/cold enough to be of any effect (probably because they're small wattage, although I can't remember what).
08-27-05, 12:26 AM
It was a 226 watter, similar to what Newbie has. It cooked up preety damn quick, since it was already overclocked to 1420 @1.95 volts to begin with.
I just slipped a cold plate and the TEC underneath the waterblock (the aluminium one i made in 2000). :shrug:
08-27-05, 03:04 PM
i remember playing with CPU TEC's... HERE (http://www.ocforums.com/showthread.php?t=259765&page=1&pp=30&highlight=frosty) is a thread i had with my first setup.
without the winter air ducted to the rad, the BIXII with 4x 120's wasnt quite enough to cool that monster...i can see why your trying to cool your water, but another TEC would require another cooling loop to cool it...not worth it
just "bite the bullet" and buy a Phase change... :p
08-28-05, 10:52 PM
Ok new strategy for cooling the 2nd tec. I am thinking about using a huge allum. heatsink I have that was used for passively cooling a 220v transformer to cool the second tec w/ out water just blow a fan on it u think that would be a good idea?
08-29-05, 12:19 AM
Like camel said, don't waste any more time.
Take it from people who have researched this already.
Like i said, I tried this and, even with two coolant loops, temp couldn't drop any more than 1ºC. Sure, if i ran it all night, then started the computer in the morning, it would be cool, but not for long.
If you want to cool the water, go here (http://www.ocforums.com/showthread.php?t=390293&highlight=%2490), this worked well, from what i understand, and on the cheap for sure.
08-29-05, 10:53 AM
If you are gonna go with the idea PoX Freak suggested, just go all the way and build yourself a water chiller. All you need is a window a/c unit of your choice (try not to go overkill here), an insulated container, and antifreeze. Also some insulation would be lovely but thats for any sub ambient rig. A cheap window a/c unit should run you about $100 if you look around.
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