The Asus Mars graphics card packs two GPU on two distinct PCB boards talking to each other via a bridge chip. Of course, the first interesting point is how the cooling has been designed. It’s quite a visually impressive graphics solution. As for performance, it should faster than a stock GeForce GTX 295 because the cooling design allows faster clock rates- that’s the idea at least.
For hardcore gamers, it is possible to link up two Mars to build a Quad-GPU solution. No pricing has been given by Asus yet, but you can expect it to cost a premium. More photos at techpowerup