DOverclock to 3.6 and beyond up to 4.0. 3.6 would be golden for you though. Once you aren't satisfied with your rates and you see better performance on benches with quads on your gpu, upgrade. The 7400 also has 50% more cache per core and a higher stock clock, meaning games that are not optimized well for quad will actually show a decrease in performance, this is one reason why I recommend the Q9xxx series. Core2duo is a very underrated gaming cpu, they can do quite a bit.