The amount of ram each GPU can address is 512MB, the memory is not pooled. The 4870X2 is a 2GB card in total, but each GPU adresses only 1GB, which is it's 'Framebuffer'. In many respects the 4870X2 is a better choice over two 4870's. The reviews should be out in a week or so last I heard so you will have more info to go on then.Originally posted by: Raventon
a crossfire with a pair of 4870with 512mb each isn't it 1gb? or it only uses the 512mb from one card and the ram on the other card is unused?