I am building my first build and am wanting to overclock a i5 750 to 4.2+ GHz. Would I be able to just cool it using air or do I need to look into a water cooling system? If i need to look into a water cooling I would also appreciate it if someone could recommend sites that would give me a basic understanding of a set up and what all I need.
From what I have seen, you would be fine with a good quality air cooler. Those i5's do very well on heat and overclocking. There are some stickies at the top of the the Overclocking thread you get you started.