eVGA water cools GeForce 8800 GTX, nForce 680i SLI
At the CeBIT show in Hannover, eVGA has been showing off a GeForce 8800 GTX graphics card and an nForce 680i SLI motherboard both outfitted with water blocks from Innovatek AG. As The Inquirer reports, the graphics card features a water block with a "ton of copper" covering a good part of the PCB. Although the card demoed was a dual-slot model, it can reportedly be modified to take up only a single slot. Also interesting is the nForce 680i SLI mobo. eVGA's regular model has a heat pipe-based passive cooling solution covering the north bridge, south bridge, and processor power regulation circuitry. The water-cooled version has custom-fit water blocks on each of those components, and the pipe stubs appear to be positioned so that a circuit can be formed from the power circuitry to the south bridge.
According to eVGA measurements quoted by The Inq, the effects of water cooling can be quite dramatic: the 680i SLI's power regulation area supposedly goes above the 100°C mark in an air-cooled system, and the north bridge can heat up to over 80°C. The same goes for the GeForce 8800 GTX's power regulation area, which also goes up above 100°C on the air-cooled model. With water cooling, the highest temperatures are around 50-60°C, and "most of the components" are said to work 10-15°C above room temperature. The Innovatek/eVGA water block kit will be offered either pre-mounted or as a separate upgrade, the Inq says.