I just upgraded my system to a Geforce 7900GT and an AMD 4200+ processor. I currently have 1 gig of ram (2x256, 1x512). I know, having a matched pair would be ideal, but it's hard to justify throwing out old RAM that still works. My question is would I benifit from adding a 1 gig stick and taking it to 2 gigs of RAM? Judging from the bechmarks, I thought I'd be able to pretty much game at 1280x1024 with everything cranked up without a hitch, but i've notices some stuttering and pausing during games when I crank the settings up. I can hear the hard drive working during these stutters.