Bought this unit today from the Futureshop store in Cambridge (even though it said online only) based on the Web Specs. Problem is the web specs were wrong for the Graphics. It does not have dual HD 4870 cards (512 mb each for 1gb total), just one HD 4870 1Gb version.
The lack of crossfire makes a big difference in the perceived cost benefits of this system and explains why only a 500 watt power supply was included to run the system.
Then, when I took it back to futureshop, the computer guy

tries to tell me that the dual DVI ports on the back was my dual card setup. Computer savvy --
NOT:help: