I currently have a Pentium 4 Prescott 3.2 GHz, and this guy I know is offering a E6420 for $80 (I can probably get it a little cheaper). I'm not sure how much duals cores change performance, even if the cores are a whole 1.1 GHz slower than what I have as single core. Can I get some advice as to if I'd notice a performance change or if it's even just worth it? Just some more info: - He used it for less than a year - Didn't overclock - He's selling it because he bought an E8500 - It has it's warranty and stock heatsink still Please don't suggest to buy something else, as I don't have the money to be buying new processors or anything really more expensive than this. Thanks.