Xbox 360 RAM: 512 MB XDR SDRAM (Unified Memory)

The Xbox 360 uses 512 MB of XDR SDRAM (eXtended Data Rate Synchronous Dynamic RAM).

• Unified Memory: Shared between CPU (Xenon) and GPU (Xenos).
• Bandwidth: ~22.4 GB/s (256-bit bus @ 700 MHz effective).
• Architecture: 8 banks of 64 MB each (Samsung K4X51163PG).

This high-bandwidth, low-latency memory was key to the 360's graphics performance, allowing the GPU to fetch textures/vertices rapidly without a separate VRAM pool.