It looks as though Galaxy Tech is going to try their hand at a dual-GPU GeForce GTX 470 videocard, at least if Computex is any indication. Galaxy Tech has been showing off a slice of silicon with two of Nvidia's GF100 GPUs slapped onto a single PCB.
The thing measures about 12 inches long and includes two 8-pin PCI-E power connectors, three dual-link DVI ports, 16 memory chips, and a whole bunch of capacitors. It's every bit a prototype card, and Galaxy Tech didn't say when, or even if they realistically plan on bringing this one to market.
The obvious challenge here would be in keeping thermals in check. A single GTX 470 comes rated at 215W TDP, and a dual-GPU solution would presumably run noticeably hotter.