first off water cooling isnt really needed for a system that isnt overclocked.the parts you have chosen for a self build are top notch for sure.4gigs of ram is overkill for now,however if you dont know how to build a pc that may be a problem.also do you have any friends that do build pc's,if so maybe get one of them to help you.as far as memory check evga's website to see if they have a memory compatibility list.