Intel Pentium 4 551 3.40GHz 800MHz 1MB Socket 775 CPU Intel Pentium 4 551 3.40 GHz 800 MHz 1 MB Socket 775 CPU General Features: Intel Pentium 4 Processor 551 3.40 GHz CPU Speed 800 MHz Bus Speed 1 MB L2 Cache Socket 775 1.25V - 1.4V VID Voltage Range Hyper-Threading Technology Intel EM64T Enhanced Halt State (C1E) Execute Disable Bit