Intel Pentium 4 640 3.2GHz 800MHz 2MB Socket 775 CPU Intel Pentium 4 3.20 GHz Socket 775 CPU General Features: Intel Pentium 4 processor 640 3.20 GHz clock speed 800 MHz bus speed 2MB L2 cache Socket 775 1.28V - 1.400V Core Voltage Enhanced Halt State (C1E) Enhanced Intel Speedstep Technology Execute Disable Bit Hyper-Threading Technology Intel EM64T S-Spec: SL8Q6 Brand new