Intel Core 2 Duo E6600 Dual-Core Processor, 2.4 GHz, 4M L2 Cache, LGA775 Power-optimized dual-core technology and exceptional energy efficiency excels running the most intense applications 2.40 GHz processor speed 4 MB L2 cache 1066 MHz front side bus Enhanced Intel SpeedStep technology Processor Fan included IntelD 60188-001 12v dc