Today, NEC Electronics has confirmed that Microsoft will incorporate leading-edge embedded DRAM (eDRAM) technology from NEC Electronics in the Xbox 360.
This custom memory has been created mostly to perform anti-aliasing operations and help overcome today's biggest problem in graphics: memory bandwidth. By using this embedded RAM, which is similar to a processor's cache memory, the Xbox 360 will be able to run games at 720p HDTV resolution, that is 1280x720, with full screen anti-aliasing and almost no impact on framerate.