This Intel Core i7 4GHZ Overclocked Barebone PC features an unlocked Intel Core i7 875K Processor, a blazing fast Quad-Core with the capacity to run stably at up to 4.0GHz. Turn up the heat whenever you feel that the stock core clock of 2.93GHz per core just isn’t fast enough! Every one of these barebone kits has a processor tested and benchmarked as stable at a minimum of 4.0GHz. A CMOS profile has been saved into the BIOS that allows, with only a few keystrokes, your kit to be overclocked to 4.0GHz. Please refer to the included documentation with you kit on the procedure on how to work with CMOS profiles.