Leaderboard

Here's a little sketch, no real measurements, just some estimates. I think the hoses need to come from the top, one directly over the GPU, the other probably in the corner between the VRAM modules. That's only the copper block, the cover could be made of plexiglass, including the mounting threads for the hoses. I have never used a watercooled system, so I've got no idea whether there are some common tricks to optimize the flow or improve the cooling... the gaps for the water are probably too narrow atm, but it's really just to visualize a possibility.

i don't think its doable for a couple reasons: 1. Unless you power it externally, you'd need a 5-12v low power pump which would probably not move the water enough to be efficient. 2. Radiator wouldn't fit anywhere in the R3 so placing it externally like you want might work but would defeat the purpose of having it. 3. Radiator still has to be actively cooled and again, the question of placement comes into play unless its placed outside making it impractical. You'd need a system casing designed to accommodate these parts. The only area that comes close to serving as a bay is where the hard drives go but then you'd need to sacrifice at least one HD to place a tiny pump there. Even the thinnest tubes would still be too thick to close the bottom door so you'd have to leave it exposed at all times. If you want to see a water cooled laptop, check this out, its a few years old now: CES 2009: Fujitsu's water-cooled notebook tech [day 3] | ZDNet My suggestions for a WC system would to be design something similar to that Fuji setup. If you want an ugly and impractical external setup, someone has done it already, check this out: Watercooling a laptop on the cheap & here's instructions on making a radiator that can attach to the existing cooling fins: Make a removable laptop water cooler! And other cool devices

I can try getting one for you and you pay for it + shipping. Will contact someone I know at Dell and find out.