I've never OCed a computer before, little nervous about it.
Nothing to it with the E8400...all you do is move up your FSB to 9x400 and you get a nice mild overclock that doesn't fry the chip, and your trucking right along at 3.6GHz @ 1600 FSB...and that memory will clock right along with it.
that case going to be cool enough for OCing the CPU?
LOL....ya. That case is probably one of the best cases for airflow that you will find. It's set up to run 8x120mm case fans, has a side air duct, two side air vents, a ventilated front...that's set up for fans, and the top of the case is vented and set up for two fans. Take a look at the pics of that case, then click onto "Specs" and scroll down below where it gives the details. That case is a strictly gaming case if there ever was one.