How much RAM did the original Xbox console have?

The original Xbox console had 64 MB of RAM. Microsoft equipped it with shared DDR SDRAM running at 200 MHz, which served both the system and graphics hardware rather than separating memory into dedicated system and video pools.

The Xbox’s memory architecture was closely tied to its PC-like design. Its graphics processor, the NV2A, could use the same memory pool as the Pentium III-based CPU. This helped developers allocate memory flexibly between game code, textures, audio, and other assets.

A common mix-up is 128 MB, which can arise from confusing the Xbox with later consoles or from describing the memory bus rather than the installed RAM. The Xbox’s 128-bit memory interface affected bandwidth; it did not mean the console contained 128 MB of RAM. The Xbox 360, released later, used a substantially different memory configuration.