Going to TEC the 8800GTX & mod the MCW60T

[hecktic]

Yah but I need to know the dimensions of the cold plate included with the MCW60T so I can determine if I need a bigger cold plate like:

2" x 2" x 1/4" Copper Block
http://www.petrastechshop.com/2x2x1cobl.html

That one is better to be used with:

226w (Qmax) 50x50mm TEC
http://www.petrastechshop.com/2250tec1.html

Does anyone know the dimensions of the cold plate included with the MCW60T ?

[jokester]

Might be a bit controversial, but is there any benefit in using a cold plate on a core that has a heatspreader over the top, as it's effectively providing the same function.

Jokester

[hecktic]

Might be a bit controversial, but is there any benefit in using a cold plate on a core that has a heatspreader over the top, as it's effectively providing the same function.

Jokester

the MCW60T itself uses a cold plate..... what are you tring to say here?

[jokester]

You use a coldplate between a TEC and a core to make sure the entire surface area of the TEC is used to cool the core. If you direct mount the TEC to the core, all you're doing is using a fraction of the TECs cooling ability to locally cool (or attempt to) 150W of you're GPU. Basically it won't work without it.

The heatspreader on the 8800 should essentially provide the cold plate function so using a coldplate as well will just add an extra temperature gradient. The ideal situation would be no IHS and use a coldplate, but it's whether IHS only is better than IHS + coldplate. I've never seen any comparisons.

Jokester

[hecktic]

Yah then that would lead one to question why swiftech included a copper cold plate with the MCWT which if I may add was nicely CNCed to fit the shape of the GPU core.

I just feel safer with a thicker cold plate made of all copper...

[AliG]

You use a coldplate between a TEC and a core to make sure the entire surface area of the TEC is used to cool the core. If you direct mount the TEC to the core, all you're doing is using a fraction of the TECs cooling ability to locally cool (or attempt to) 150W of you're GPU. Basically it won't work without it.
Jokester
I would disagree that you use the cold plate to cool the tec, not the core necessarily (depending on your block it can go either way). Quite simply, if you don't cover the entire tec, it will burn itself out, so that will leave you with a useless tec and a possible dead gfx card:up:

[hecktic]

I would disagree that you use the cold plate to cool the tec, not the core necessarily (depending on your block it can go either way). Quite simply, if you don't cover the entire tec, it will burn itself out, so that will leave you with a useless tec and a possible dead gfx card:up:

Right. Im going to copy the layout of the MCW60T really... just replacing the 188w with a 226w and I might replace the cold plate included with the one I posted above which is fairly thicker and better but Im going to have a frustrating time getting it to look like the one included with the MCW60T

Any ideas/suggestions

http://us.st11.yimg.com/us.st.yimg.com/I/yhst-65556269779593_1956_29035029
http://us.st11.yimg.com/us.st.yimg.com/I/yhst-65556269779593_1956_29163940

here is the one included
http://www.swiftnets.com/assets/images/products/MCW60/mcw60-baseplate-front.gif

[hecktic]

I just found out the cold plate included with the MCW60T is a 40x40 as is the 188w peltier..... which means I cannot use a 226w or a 50x50 peltier... dang Im so pissed .... now I need to find a good water block to use with a 226w 50x50 peltier

[tylerdustin2008]

Make one for it. This is Xtreme Systems!

[hecktic]

Make one for it. This is Xtreme Systems!

Yep I actually have no choice but to make one...

[jokester]

I would disagree that you use the cold plate to cool the tec, not the core necessarily (depending on your block it can go either way). Quite simply, if you don't cover the entire tec, it will burn itself out, so that will leave you with a useless tec and a possible dead gfx card:up:
The cold plate doesn't cool the cold side, but you do need full coverage on the hotside (ie the waterblock).

Directly applying a GPUs 150W of heat to 20% of the surface area of a 225W TEC won't do it a lot of good. I've tried it before, it works fine until the core is running loaded.

The heatspreader on a 8800 is only about 40x40mm so you are probably better using a 50x50mm coldplate otherwise otherwise a good portion of the cooling capacity will be wasted round the edge.

Jokester

[hecktic]

The cold plate doesn't cool the cold side, but you do need full coverage on the hotside (ie the waterblock).

Directly applying a GPUs 150W of heat to 20% of the surface area of a 225W TEC won't do it a lot of good. I've tried it before, it works fine until the core is running loaded.

The heatspreader on a 8800 is only about 40x40mm so you are probably better using a 50x50mm coldplate otherwise otherwise a good portion of the cooling capacity will be wasted round the edge.

Jokester

yah but how do you mount a 50 x 50 cold plate on a core that is only 40 x 40 ?

[jokester]

It'll fit in between the mounting holes, just have the edges overhanging the heatspreader and make sure you take adequate protection against condensation.

Jokester