DUAL CHANNEL RAM! serious dude, the only way to have 1.5gigs of ram is to be single channel, dual channel ram effectively doubles your PCs speed because twice as much data can be filed ina given time. Either get 1gig[2*512mb](which should be more than enough) or 2gigs[2*1gb](far more than enough) trust me on this... for economy ram(no plans on overclocking) http://www.newegg.com/Product/Product.asp?...N82E16820145440 for awesome overclocking ram http://www.newegg.com/Product/Product.asp?...N82E16820146890 if you want 2 gig new egg for it...