Xenon (processor) - Specifications

Specifications

• 90 nm process, 65 nm process upgrade in 2007 (codenamed "Falcon", later "Jasper"), 45 nm process since Xbox 360 S model
• 165 million transistors
• Three symmetrical cores, each two way SMT-capable and clocked at 3.2 GHz
• SIMD: VMX128 with 2× (128×128 bit) register files for each core
• 1 MB L2 cache (lockable by the GPU) running at half-speed (1.6 GHz) with a 256-bit bus
• 51.2 gigabytes per second of L2 memory bandwidth (256 bit × 1600 MHz)
• 21.6 GB/s front-side bus( On the CPU side, this interfaces to a 1.35 GHz, 8B wide, FSB dataflow; on the GPU side, it connects to a 16B wide FSB dataflow running at 675Mhz.)
• Dot product performance: 9.6 billion per second
• Restricted to in-order code execution
• eFuse 768 bits
• ROM (and 64 kbytes SRAM) storing Microsoft's Secure Bootloader, and encryption hypervisor
• Big endian architecture