I was looking at a game to buy for my laptop, specifically DiRT 2. My graphics card isn't a problem, it is above the min requirements but below the recommended. However, the game states a 3.0GHz Pentium D or better is needed to run the game. I know the Pentium D runs slower than the clock speeds suggest, but I have a Pentium Dual-Core t4400 @ 2.2GHz, which is still a budget processor. What is the true comparison between them, which one is faster and by how much? Help is appreciated, thanks!