http://www.youtube.com/watch?v=4AGAohJuovY
Some Xbox 360 hardware specifications.
Custom IBM PowerPC-based CPU
• Three symmetrical cores running at 3.2 GHz each
• Two hardware threads per core; six hardware threads total
• VMX-128 vector unit per core; three total
• 128 VMX-128 registers per hardware thread
• 1 MB L2 cache
CPU Game Math Performance
• 9 billion dot product operations per second
Custom ATI Graphics Processor
• 500MHz processor
• 10 MB of embedded DRAM
• 48-way parallel floating-point dynamically scheduled shader pipelines
• Unified shader architecture
Polygon Performance
• 500 million triangles per second
Pixel Fill Rate
• 16 gigasamples per second fill rate using 4x MSAA
Shader Performance
• 48 billion shader operations per second
Memory
• 512 MB of GDDR3 RAM
• 700 MHz of DDR
• Unified memory architecture
Memory Bandwidth • 22.4 GB/s memory interface bus bandwidth
• 256 GB/s memory bandwidth to EDRAM
• 21.6 GB/s front-side bus
Overall System Floating-Point Performance
• 1 teraflop
Storage
• Detachable and upgradeable 20GB hard drive
• 12x dual-layer DVD-ROM
• Memory Unit support starting at 64 MB