I don't think w7 is as big a memory hog as vista was. I have it as a dual boot on a Dell dimension 3000 with 2 gig ram(the maximum allowed by the m/board) and its like lightning. I also tried it on my acer one which had linux originally,512 mb ram 7gb ssd. It ran ok but when I installed an av did updates etc. the ssd was very tight on space which slowed it down eventually.According to its task manager memory never seemed to be an issue,there was always plenty of ram free at any given moment.