so i'm planning to buy this soon and i see a 256mb version and a 512mb version, but there are like no reviews for the 512mb, so i didn't know if i was missing something (because i assumed for $20 more i should get the 512mb, right?).
The 3870 is cheaper, it runs cooler, and it runs quieter. The 3870 is also within spitting distance of the 8800gt and actually beats it in some* games.
*ok ok it's like one game beting it by like 5fps but so what
And no I'm not an ATI fan I just think it is a better card.