Intel Unlocked & Overclocked Core i5-2500K 4.4 GHz Pre-Configured Bundle Pre-configured and overclocked to 4.4GHz right out of the box, pre-tested for stability EFI BIOS with AI Tweaker Suite allows users to easily adjust intricate system settings with ease for overclocking Supports up to 32GB DDR3 2133(O.C)/1866(O.C.)/1600/1333/1066 MHz 2x PCI Express 2.0 x16 Slots (Single @ x16 or Dual @ x8/x8 mode) Easy to install Corsair H60 High-Performance Liquid CPU Cooler included