A quick thing about your ram problem/problems. If your bios allows it, you could overclock your ram, thus making it run at a higher frequency(unfortunately this can cause problems/lower the expected life of your hardware so I wouldn't try this if you aren't comfortable with it). Also in your bios there is a memory hole option. I don't remember exactly how to do it, since i haven't fixed a problem like this for about 2 years, but you need to disable the memory hole in your bios. I can give you more specifics later if you would like but I am on my laptop right now (which is a mac) so I can't really check. hope this helped a bit.