best pelt for vid card?

[libertate]

I'm going to be watercooling my radeon9700 with
chilled water (hopefully around -40)..... I want to use
a pelt to make the gpu even colder, so I was wondering
what wattage would be best for the r300 gpu?
I was thinking a 156watt would do the job.....

[King_of_qb]

that is real high i would use like a 80w

[Chong345]

I dunno that seems like a good pelt. I currently have the MCW40-T from swiftech. It does a good job but it could be colder. Thne again your water temps are much colder than mine. Mine only gets to -22C.

[BigBadger]

I'm using a 156W pelt on my geforce3, works fine. However it would put a lot of heat into your water (around 250W) so you would need one hell of a refrigeration system to keep the water down at -40C. I'd guess that once the heatload from the cpu is added plus any heat absorbed from the atmosphere you're looking at at least 1.5hp compressor.

[docah]

I was thinking of popping an 80W TEC on my GF4 4200 to see how far i can push it. Basically the same question pressing libertate. I've peltier cooled before, and i know underkill is more dangerous to the well insulated component than overkill when it comes to wattage. Should i aim higher than an 80W pelt, 150~160W ? or should 80W suffice for a GPU? i really don't know what the power usage of these chips is though i'd assume it's no more than 30-40W which would be fine with an 80W tec.

[Hardass]

I run the 80W, on my Ti4600. In a room where temp is on average 78F. My temps run 19c. That,s benching.

[docah]

Sweet, that settles it... 80W tec it is.

[Hardass]

Here,s where I got mine. XTW (http://www.xtwerkz.com/graphics_liquid_blocks.htm)

[sysfailur]

Originally posted by docah
Sweet, that settles it... 80W tec it is.

I'd go w/ 156w, but well, that's me (http://www.maximumoc.com/img/hardware/gf3_156w_pelt/shot6.jpg) ;)