Ok, Thank You. And yes, right now i only have 2gigs and was looking at getting 2 more. Would getting the additional 2 gigs help?
ram is cheap, here is why 4gb is better than 2gb:http://www.corsairmemory.com/_appnotes/AN804_Gaming_Performance_Analysis.pdf
With a dell, make certain that the vga card fits, and that your psu is adequate. Dell does not usually give you a psu that does more than power what you ordered. You might ask the local store to check that out.