I have a Dell Dimension 3100, and am looking for ways to speed it up, hardware wise. I have all ready upgraded to 2gb of ram, 32mb cache 320gb hardrive. I also am using Windows 7, as I have found for me it is MUCH faster than XP. I haven't upgraded the CPU or Graphics card. If I upgrade the CPU, I think I have to upgrade the Graphics as well, as it is built in, I think?? I currently have an un-upgraded Celero 3.06Ghz and am on 32bit. What's the next thing I should do?