I am 15 and building my own computer. I know whats best for most of the hardware but am unsure about what coolers I should get for overclocking the Intel core i7 3770k processor that I will be buying. I will be hoping to get 4.2ghz or above if at all possible. Any help with what water cooler i can get considering the fact that my case will not be able to fit coolers that have fans and radiators bigger than 120mm. If i need to pay more than my budget for it then i will but i was aiming to keep the cost lower than £100.