I've been looking into building a gaming computer and I'm trying to decide on a graphics card. I'm planning on building an AMD Phenom II X2 550 processor on a Gigabyte (crossfire ready) Mobo with about 4gigs of 1600 DDR3 ram on a 650W Corsair PSU (4 PCI-E cables).
Basicially my thread title says it all. I'm trying to get a good comparison on price to performance between the single 5770, crossfired 4850s and then the single sapphire 4850 X2 (which has the two gpus in one foot long board).
From what I've seen the single 5770 is about $180, the crossfired 4850s will be about $240 for the pair, and the single sapphire 4850X2 runs about $240 as well.
EDIT: Also want to add an HD4890 into the mix. Thoughts about this card relative to the others would also be appreciated.