GIGABYTE GA-X48T-DQ6

I'm looking into buying this board and was looking at 2 different
ether the
Sapphire 100243-1GL

or

Sapphire 100251SR

the Sapphire 100251SR is dual vid card @ 512-bit 256 per can the mother board even take advantage of the 512?

hmm no one? ok is it worth getting the single dual vid card?

Get whichever you want the 4870x2 is obviously faster than the 4870 1GB unless you crossfire the 2 4870 1GB cards then I would hope it would be a wash.