wow... 2GB of RAM on a VIDEO CARD!? 
via CrunchGear by Dave Freeman on 3/5/09
Video card technology seems to compete with CPU technology, both of them continuing to obey Moore’s law, and becoming faster and faster with each iteration. Many manufacturers have also taken to increasing the amount of memory on their existing cards. Most the time, this results in at least noticeably better performance, as we’ve seen.
In this same vein, it looks like Sapphire has upped the memory in their Radeon HD 4870 to 2 gigs. Will this result in another significant speed increase? Probably not, but you will be able to use some of the higher quality AA, bigger textures or better shadow mapping. No word on U.S. availability or pricing at this time, but we’ll keep you updated as more information becomes available.
[via Ubergizmo]