We'll start off with Call of Duty 4. Clearly two Radeon 4870 cards lead the way but at 2560x1600 things start to even up with two 4830 cards in Crossfire. The 4830 is about 10% slower than a 4850 which is where expect it to be and about on part with an overclocked GeForce 9800 GT.

In Crysis we see a similar pattern but the Crossfire cards are obviously CPU bound even at a "Very High" graphics setting. Unfortunately Crysis doesn't support 4 cores well and the Phenom at 2.6GHz is unable to push the cards and the game enough with only two core suport.