When you overclock,you are pushing the CPU above and beyond the "safe" zone as per manufactuers spec. Depending on your motherboard,some motherboards have utilities you can download from their site to monitor and tweak the CPU from your desktop. BE WARNED!: overclocking can lead to a fried CPU! Be sure you have adquate system cooling on both the CPU and your tower or case, as the overclocked CPU will run much hotter than before.