Re: Will this be fast enough
Alrite dude, your x1300 should perform okay on most games. I hear its not exactly the best line of cards from ATI, but it will run most games on decent frame rates. Stick with 2 sticks of 512mb, or 2 sticks of 1gb. Don't buy more than 2gb of ram. It's just a waste. Oh and by the way, you might want to run CPU-Z, just to make sure that the type of ram you're buying is compatible with your comp.
Rig -- Emachines T5026, 3.06ghz P4, 300W Bestec PSU, 160 sata hd, 512mb dual channel 3200 ram @ 3-3-5-8, ATI Radeon 9250 pci, dual layer 16x dvd+/-rw.