Pelt cooling (QX6700)

[USFORCES]

I've looked into chilled water and Phase, now to pelts.

Could a pelt (437W) run a QX6700 at 15C with the right volts 24/7?
The reason, 15C is a good temp for it I can get close to 4GHz if I want, also I don't have to worry about condensation.

Also how much heat would it give off because my GPU's are in the loop also.

THX
USFORCES

[p8ntslinger676]

what does your current loop consist of? because a single 120.3 will not be able to cool all of that. and you could get those temps, but with how much you would be spending to upgrade everything (new rad, tec, coldplate, new wb, dedicated psu) you might as well just spend the few $ extra and buy a decent used phase unit from the b/s/t forum here on xs (you can only access the b/s/t forum after 100 posts) one more thing, you will have to deal with condensation if it is anywhere below ambient, just to let you know so unless it is 15c there you will need insulation ect.

[Holst]

The wattage of your CPU at stock is 65x2 130watts at 2.66ghz.
At 4ghz it will be approximately 130*4/2.66 = 196watts
At stock voltage!!

Theoretically a 436watt pelt will be able to cool your CPU to around the sorts of temperatures you want (15*c)

But as p8ntslinger676 says you are going to need to upgrade your radiators significantly to cope with the heat of the TEC.
Its difficult to estimate exactly how much power a 436watt TEC will use, but at maximum it will be 875watts (26.7c * 32.8amps)
You should anticipate the TEC using 600watts + 200 for the CPU.

Personally I think that phase change is more likely to get you the results that you require for the least money and trouble.

[Marci]

Honestly, the thought of pelt cooling an overclocked quadcore makes me cringe in a VERY big way... the heatload is IMMENSE... to do so would require some SERIOUS airflow, and thus serious noise. I agree entirely with Holst... custom tuned phasechange for a 200w+ heatload makes FAR more sense, and far less noise... probably for the same or less financial outlay.

[[XC] riptide]

USFORCES.... 3.6Ghz-3.8Ghz can be obtained with pretty good WC system alone. I measured my Quad cores power draw with a kill-o-watt. At full load, 1.58vcore set in bios (not sure about actual) POS PCI card one HD and not much else = 220W. Thats from the wall.

[[XC] riptide]

riptide;2218682']USFORCES.... 3.6Ghz-3.8Ghz can be obtained with pretty good WC system alone. I measured my Quad cores power draw with a kill-o-watt. At full load, 1.58vcore set in bios (not sure about actual) POS PCI card one HD and not much else = 220W. Thats from the wall.

Marci... I sold my pent D's a while go and never got to measure power draw with any.

But I'm gonna guess that a 945 3.4Ghz Pent D clocked to 4.4Ghz with associated vcore jump, produced more heat than a Quad.

In reality i think that overclocked netbursts are hotter than Quads.

[teyber]

thats a huuuge tec... would need a great wc setup for that

[serialk11r]

YOWZERS a gigantic TEC cooling a quad...[vomit] that is some serious electricity whoreage. Like the others said making your water loop cool the TEC effectively is going to cost a lot and you're much better off with phase. A 437W tec running like that will surely increase your power bills by a lot.

[littleowl]

YOWZERS a gigantic TEC cooling a quad...[vomit] that is some serious electricity whoreage. Like the others said making your water loop cool the TEC effectively is going to cost a lot and you're much better off with phase. A 437W tec running like that will surely increase your power bills by a lot.

not a lot but a good bit.

[USFORCES]

THX Guys :)

Water does a good job upto 3.6 but anything higher it needs better cooling,
I can take it to 3.9 if I use cold water at 15C, just need to keep it there.

Right now I'm using a double and a triple rad and two 8800GTX's in the loop,

http://img383.imageshack.us/img383/628/pc2ke3.png

[[XC] riptide]

Nice setup! :clap:

[serialk11r]

That is one nice loop...:slobber:

[AliG]

I've looked into chilled water and Phase, now to pelts.

Could a pelt (437W) run a QX6700 at 15C with the right volts 24/7?
The reason, 15C is a good temp for it I can get close to 4GHz if I want, also I don't have to worry about condensation.

Also how much heat would it give off because my GPU's are in the loop also.

THX
USFORCES

No, here's why. First of all, you need a custom made block for a 437w peltier, if you don't completely cover the entire block, you'll burn out the peltier and add more heat before the peltier does blow itself out. Secondly, you'll need to buy a 600w auxiliary psu with a 24v rail. Meanwell has one, but it aint cheap. Third, you'll have to mod your regular psu to sync it with the auxiliary one meaning potential damage to the psu and no more warranty, plus tons of work with a dremel and what not. Fourth, you'll need to add a second radiator just for the tec, because that tec will be pumping out 437w of heat AT ALL TIMES, so you can't plan on putting a tec on the same loop as the rest of your watercooling stuff.

And finally, you're energy bill will skyrocket:shocked: because it's draining around 600w at at all times; why you ask when it's rated for 437w? Because tec(s) have horrible efficiency and draw tons of power to achieve their rated amount.:shocked:

Phase would be the smarter choice, chilled liquid is ok, but to tell you the truth for the amount of work it takes to build a chiller, you might as well go phase. The only big differences between the two structure wise (highly simplified here) are the blocks you'll use, you need to worry about condensation far more with phase and so can't use plastic tubing like you can with water, and finally you're using a gas instead of water. Now I highly simplified this so a person that hasn't spent too much time with phase or chillers to understand, so others that know about phase please don't flame.

One other big problem with chillers is that it's just chilled water, so as soon as that chiller passes through one object that puts out lots of heat, the water temp just went back up to what you had earlier so you'd only get improved temps on one object. If you just wanted to have a cpu on the chiller, it'd be fine, but not with the sli'd cards in too. And don't forget chiller's can't get subzero temps like phase, just another random reason to pick it:up:

[Duh]

No, here's why. First of all, you need a custom made block for a 437w peltier, if you don't completely cover the entire block, you'll burn out the peltier and add more heat before the peltier does blow itself out. Secondly, you'll need to buy a 600w auxiliary psu with a 24v rail. Meanwell has one, but it aint cheap. Third, you'll have to mod your regular psu to sync it with the auxiliary one meaning potential damage to the psu and no more warranty, plus tons of work with a dremel and what not. Fourth, you'll need to add a second radiator just for the tec, because that tec will be pumping out 437w of heat AT ALL TIMES, so you can't plan on putting a tec on the same loop as the rest of your watercooling stuff.

And finally, you're energy bill will skyrocket:shocked: because it's draining around 600w at at all times; why you ask when it's rated for 437w? Because tec(s) have horrible efficiency and draw tons of power to achieve their rated amount.:shocked:

Phase would be the smarter choice, chilled liquid is ok, but to tell you the truth for the amount of work it takes to build a chiller, you might as well go phase. The only big differences between the two structure wise (highly simplified here) are the blocks you'll use, you need to worry about condensation far more with phase and so can't use plastic tubing like you can with water, and finally you're using a gas instead of water. Now I highly simplified this so a person that hasn't spent too much time with phase or chillers to understand, so others that know about phase please don't flame.

One other big problem with chillers is that it's just chilled water, so as soon as that chiller passes through one object that puts out lots of heat, the water temp just went back up to what you had earlier so you'd only get improved temps on one object. If you just wanted to have a cpu on the chiller, it'd be fine, but not with the sli'd cards in too. And don't forget chiller's can't get subzero temps like phase, just another random reason to pick it:up:

1)Do you actually know where the guy lives? In my place, energy is dirt cheap :) ( As opposed to Cal)
2) Not being able to have subzero temps in chillers ain't true.

[AliG]

Well, most places energy costs quite a bit

but I know in my home country energy is dirt cheap too

but that's just one of the minor reasons, the other ones are more important

[Holst]

Third, you'll have to mod your regular psu to sync it with the auxiliary one meaning potential damage to the psu and no more warranty, plus tons of work with a dremel and what not.

What?
Can you explain this comment please.. makes absolutely no sense to me.
You dont need to mod your PC PSU to use a peltier.


because that tec will be pumping out 437w of heat AT ALL TIMES

This is totaly false.
I have allready posted some correct(ish) numbers for power consumption, please see above.



One other big problem with chillers is that it's just chilled water, so as soon as that chiller passes through one object that puts out lots of heat, the water temp just went back up to what you had earlier so you'd only get improved temps on one object. If you just wanted to have a cpu on the chiller, it'd be fine, but not with the sli'd cards in too. And don't forget chiller's can't get subzero temps like phase, just another random reason to pick it

This is also totaly incorrect.

A chiller with enough power can cool any number of components. And there should be little if any temperature differential between components with normall flowrates.
Chillers CAN also cool sub zero, but you need to insulate everything and also use correct fluid (water will freeze, obviously)

Please dont be offended, and thankyou for trying to help. But wrong information dosent help anybody.

[serialk11r]

Even with dirt cheap electricity 600W 24/7 is going to put a dent into your wallet. If you ran it for short times only that would be fine but...efficiency efficiency efficiency

[Duh]

I do not know wether my k7 rig and my am2 rig together consume 600 w sumed but I don t see any differences in my power bill, although I have em 24/7 both

EDIT: serial, If you are so concerned about efficiency, you would not have bought that psu you have. Although it is not the EXACT model, here I can provide some numbers for ya:

NeoPower 480 Power Supply
AC Input 110 142 220 276 336 390 515 596
DC Output 65 90 150 200 250 300 400 460
Efficiency 59% 63% 68% 72% 74% 77% 78% 77%
Waste 45 52 70 76 86 90 115 136

Corsair HX520W Power Supply
AC Input 64 88 115 183 236 295 350 486 638
DC Output 43 63 89 148 199 251 298 407 519
Efficiency 68% 72% 77% 81% 84% 85% 85% 84% 81%
Waste 21 24 26 35 37 44 52 79 1

http://www.codinghorror.com/blog/images/power-supply-efficiency-comparison.png

cheers

J

[serialk11r]

That's not the PSU I have, the one I have happens to have a maximum of 86% efficiency ;) although its advertised as 87%...big deal.
Your 2 rigs probably aren't doing 600W because the graphics aren't fully loaded ;) But you see, a 226W TEC running 24/7 max power and paying 0.15$ per KWH (3.6MJ) you end up paying a whopping 0.32X0.15X24X30 dollars which amounts to...1.024X30=30.72 dollars per month...then add in the energy lost from the PSU in conversion, X1.2 so that's 36 dollars each month for a 226/320 TEC running max power 24/7. To cool a quad you'll be paying around 50 if you turn the volts down a bit. At max power you're looking at around 70 dollars a month to run the TEC 24/7. The cheapest utilities will still charge you quite a bit.