Honestly I don't think that the extra memory is worth the extra cost. I've heard that the 7900GT will never use that extra memory. More important is the memory bit (all 7900GT's have 256 bit memory). What you might want to invest your money in is a factory overclocked card. (eVGA's 7900GT superclocked maybe?) The eVGA is at 550mhz compared to 450 stock, overclocked performance, but still under warranty (though it's no longer available at Newegg, a little harder to find).