Well. My computer fell behind. . My graphics card, an ATI Radeon HD 2400 Pro ( I bought it a week ago), that I stuck into my 3 or 4 year old Dell Dimension 9100. Well, I tried putting up some settings on Call of Duty 4... and BAM. Not much improvement. A bit of messing told me it was the 3.0 Ghz single core pentium 4 sitting on my motherboard. So, I want it faster. How far do you think I could push it without losing reliability... Or, an alternative, a new motherboard with a new pc. Of course, I'll need to buy new RAM too, right?