Yeah... need more info! List everything. If it's a prebuilt link it, if you've chosen parts supply the full list as well as what monitor resolution you'll be on.
you want to go with at least 4 gigs of ram these days and with how cheap prices are I'd go with an 8 gig kit if i was building a new machine, you need to list your full system specs if you expect to get any worthwhile advice on here