Radeon 4870 with 1GB of DDR5 – is it worth it?
But if you trust HardOCP (and I do), that doubling of video RAM makes for a simply better gaming experience , and at a relatively small premium to boot (a 512MB 4870 costs ~$275, a 1GB 4870 ~$300). Although games are pushing more on the performance front than the RAM front, it helps to have that cushion of space for swapping, caching, and so on.