AMD Phenom X4 9550 2.2GHz 4x512KB Socket AM2+ Quad-Core CPU - CPU ONLY AMD Phenom X4 9550 2.2 GHz 2 MB Socket AM2+ Quad-Core CPU General Features: AMD Phenom X4 Quad-Core Processor 9550 model number 2200 MHz frequency (2.2 GHz) 2 MB L3 Cache 4 x 512 KB L2 Cache 4 x 128 KB L1 Cache Socket AM2+ 1.10/1.15/1.20/1.25V voltage 65 nm SOI CMOS technology 32/64-bit operating mode True Multi-Core Design AMD64 with Direct Connect Architecture