Intel Pentium 4 661 3.60GHz 800MHz 2MB Cache Socket 775 CPU Intel Pentium 4 661 3.60 GHz 800 MHz 2 MB Socket 775 CPU General Features: Intel Pentium 4 Processor 661 3.60 GHz CPU Speed 800 MHz Bus Speed 2 MB L2 Cache Size Package Type: LGA 775 Hyper-Threading Technology