new ASUS ARES II 7970
Dual GPU clocked at 1050ghz
Closed loop watercooled
Dual slot form factor so you can fit 4 of them in a ATX tower

no offical price but suspect around 1300-1500$... ouch!
definitely not worth the price or the hassle. easier and cheaper to just run 2x 7970. also, 8970 will be out in Q2 with the GCN2 architecture...