i read somewhere on tomshardware that windows xp 32 bits cant see more than 3 gigs of ram. so the solution to have 4 gigs of ram would be to instal the 64 bits version of xp. what would change? I have no clue about this things, I mainly use photoshop cs3 and games plus the usual movieplayers and firefox and word and a tv tuner etc. please explain what should I consider for installing 64 bits version of xp, I really need 4 gigs of ram.