Processor - 1 x AMD Athlon 64 X2 4400+ / 2.3 GHz Energy Efficient Small Form Factor - Socket 939 AM2 - L2 1 MB ( 2 x 512 KB ) - Box Increase your performance by up to 80%, work or play with multiple programs without any stalling or waiting 2.3 GHz processor provides dual-core system capability in single-core system configurations AMD64 core provides leading-edge performance for both 32-bit and 64-bit applications; 1 MB L2 cache Support for DDR2 SDRAM memory, up to 12.8 GB/s memory bandwidth Cool'n'Quiet technology for quieter operation and reduced power requirements; energy-efficient 65-watt power