I don't disable the pagefile to gain any performance. I do it so my SSD doesn't die horribly. And since my SSD and PC have been running for 2 years and can still play games smoothly I can safley say disabling it does fapp all (other than save your HDD/SSD wear and tear).
Plenty of people run more than just one application at once, and alot of people run multiaple games at once. Just becuase you don't, doesn't mean noone else does.
Having more ram, won't increase your FPS in games unless it's being fully used. And since in your case it's only at 70% capacity, there will be no point. You could get faster ram, but once again no change in FPS, the only benifit to getting faster ram would to lower load times.
JF_Talon if your going to do is post nothing useful and be offencive and rude, then I think you should just not bother posting at all. I mentioned page file because he mentioned it in his post, and to show that the pagefile has no effect on fps at all unless you have very low amounts of ram (1gb -2gb). And even then, the amount you use for the pagefile is best left to whatever the OS thinks is right.