TheKraken

I don't like that it goes from the radiator to the GPU, then the CPU. The coolest water should hit the CPU first, then you can worry about whatever else needs to get cooled. The cooler the CPU, the better it runs; however, GPU's are not the same. GPU's can run, and perform better at luke warm temps, rather than very cool temps. Hit the CPU block first, then you can go to the GPU's.

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CrimsonMango

RAD > CPU > GPU1 > GPU2 > RES > PUMP > BACK TO RAD


all consistent 1/2" ID tubing, and ran in a simple series loop


keep it simple, keep it cool



edit: also, if possible, get a triple 120mm radiator, it will help temps with SLI alot

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cchant

I used the same loop as noted above in my old SLI setup and my temps at full load CPU 31 C, GPU 1 39 C, GPU2 43 C. As you can see the temps do go up as you get further in the loop.. but 43C is pretty chilly lol. For a radiator I'm using the heater core from a pontiac inside of a wood shroud with 120mm fans on both sides to push and pull air through it. Seems to be working quite nicely.

blair

maybe i could go fro CPU to split, to rad to res to pump???

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soloz2

yeah, it says vga cooler, but it'll work on the chipset. I'm going to install mine later today. I'll prob post pics in my thread

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The Duke

From what I've read so far it seems the 7900GT cool fine with the stock air set up even with the 1.5v mod.
Something to consider... if the above is proven factual, your water will cool the other components better without the load of the GPUs.

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soloz2

yep, it fits just fine! no modification necessary. you can check out my pics in this thread:
http://www.overclock.net/water-cooli...tml#post861655

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Sideburns

I'd go for 2 Zalman VF900CU heatsinks...then just watercool the CPU. That's a lot of heat to put in one loop. Especially if you're gonna have one after another...so one will defn run hotter...

0rion

From the pics posted, I cant say im entirely satisfied with what's been suggested. If it were me, I would go from the pump, to the reservoir, to the CPU, then put in a split. From the split, the water goes to the two graphics cards, then have another Y, making the 2 channels back into one. then have it go to the radiator, then back to the pump. or somehting like that, but what I would prefer is to have a Y before the gpu's, and an Y after. This way, both graphics cards recieve the same temperature water. If you put them like the 2nd pic shows, the water just gets hotter and hotter as it goes along- this meaning, GPU1 will get colder water, and the GPU2 will get hot water that just came from GPU1. if you split the flow first, both GPU1 and GPU2 would get the same temp water. Flow would be a bit less while running through the cards, but merging them back into 1 after the cards will reassert the flow. If u want a pic ill try to whip one up.

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soloz2

you could always split up your cpu and your gpus separatly like this:

pump > rad > Y split to both cpu and gpu 1 > gpu 2 (from gpu 1) > Y combine both and go to res > pump.

this splits up your cpu from your graphics cards.

another idea would be if you have a powerful pump.

pump > rad > cpu > small rad > gpu 1 > gpu 2 > res > pump
In this setup you could run a double and a single rad or a heater core and a single rad. the second rad could be mounted inside your case to the back where there is normally the exhaust fan. You wouldn't even need a fan on that rad if you wanted quiet. (although a fan would cool better)

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