Intel Pentium 4 651 3.4GHz 800MHz 2MB Socket 775 CPU Intel Pentium 4 651 3.40 GHz 800 MHz 2 MB Socket 775 CPU General Features: Intel Pentium 4 Processor 651 3.40 GHz CPU Speed 800 MHz Bus Speed 2 MB L2 Cache Socket 775 1.2V - 1.325V VID Voltage Range Enhanced Intel Speedstep Technology Hyper-Threading Technology Intel EM64T Enhanced Halt State (C1E) Execute Disable Bit Intel Thermal Monitor 2