Gadget site Gizmodo has managed to get hold of some snaps of a Quad core AMD Phenom system that was running a demo of Stranglehold, an upcoming game from John Woo.
AMD didn't mention any specifications, but you can clearly see that the system is running dual Radeon HD 2900 XT cards from the pictures. It also seems to use 4GB of Corsair Dominator memory.
You can't really tell what motherboard the system is using, but it looks like an AMD prototype board and it might be using the RD790 chipset.
The game screen shots don't look that impressive, but the game seems to be using "bullet time".
You can check out more pictures here