Can't find what's holding me back

[razhem]

Thanks for all your replies. After thinking what I wrote I expected as much... Anyway, anyone can link me to a reliable overclocking guide so I can give that a try and so how it goes? As for the 4GB RAM, I'm as confused as you, I literally upgraded my RAM and GPU yesterday and my biggest surprise was 7 telling me only 3 of the 4GB are usable. Googling a bit read something about the other GB being reserved for other functions of the PC, but when I was only packing 2 it never said anything of the sort, so a bit dazed there.