• The Intel x86 processor of the Xbox has been replaced by a custom IBM-designed processor based on the PowerPC architecture. (90 nm process, 165 million transistors)
• Three symmetrical cores running at 3.2 GHz
• Two hardware threads per core; six total
• VMX-128 vector unit per core; three total
• 128 VMX-128 registers per hardware thread
• 1 MiB L2 cache (Lockable by Graphics Processor)

• 337 million transistors total
• 500 MHz parent GPU (90 nm process, 232 million transistors)
• 10 MiB daughter eDRAM Framebuffer (90 nm process, 105 million transistors)
  • eDRAM has internal logic for Color, Alpha Blend, ZStencil and MSAA.
• 48-way parallel floating-point dynamically-scheduled shader pipelines (ALU's for Vertex or Pixel Shader processing)
• Unified shader architecture (This means that the pipelines are shared between pixel pipelines and vertex shaders; for example, 42 pixel pipelines : 6 vertex shaders).
• 16 Filtered & 16 Unfiltered Texture samples per clock
• Polygon Performance: 500 million triangles per second
• Pixel Fill Rate: 16 gigasamples per second fillrate using 4X MSAA
• Shader Performance: 48 billion (48,000 million) shader operations per second (96 billion shader operations per second theoretical maximum)
• Dot product operations: 9 billion per second (Microsoft figure), 33.6 billion/second when combined with CPU power

• 512 MiB 700MHz GDDR-3 RAM (unified memory architecture)

System Bandwidth

• 22.4 GB/s memory interface bus bandwidth (700 MHz x 2 accesses per clock cycle (one per edge) on a 128bit bus)
• 256 GB/s eDRAM internal logic to internal memory bandwidth
• 32 GB/s GPU to eDRAM bandwidth (2 GHz x 2 accesses per clock cycle on a 64bit DDR bus)
• 21.6 GB/s frontside bus (Aggregated 10.8 GB/s upstream and downstream)
• 1 GB/s southbridge bandwidth (Aggregated 500 MB/s upstream and downstream)

Overall System Floating-Point Performance

• 1 TFLOPS theoretical peak performance

Physical Dimensions and Weight

• The Xbox 360 weighs 3.5 kg (7.7 lbs)
• 30.9 cm wide x 8.3 cm high x 25.8 cm deep
• 12.15" wide x 3.27" high x 10.15" deep