recently built a core i7 920, and ati 4870 x 2 with the antec 300 was a lovely fit and super temps, so i can let u know it will work as a good gaming rig wih the bigest GPU, though id not suggest it for SLI cause the GPU took up 1/2 drives for the hard drives. however still left room for 4 hard drives so SLI or xfire may only leave with space for 2 hard drives