Xbox 360 RAM: 512 MB GDDR3 (All Models)

Every Xbox 360 model—regardless of hard drive size (20GB, 60GB, 120GB, 250GB, 320GB, 500GB) or revision (Original, Slim, E)—has 512 MB of unified GDDR3 RAM clocked at 700 MHz (1.4 GHz effective).

The hard drive capacity only affects storage space for game installs, saves, DLC, and media. It does not increase system memory or improve graphical performance.

Quick Specs Reference

• CPU: 3.2 GHz Triple-Core PowerPC (Xenon)
• GPU: 500 MHz ATI Xenos (Unified Shader Architecture)
• RAM: 512 MB GDDR3 (Shared CPU/GPU)
• eDRAM: 10 MB (Embedded in GPU for 4x MSAA / Frame Buffer)