WOW guys all this info is amazing. Looks like I might be scaling down slightly and going for a Q9550. I looked into the i5/i7 chips but I paid £40GBP for my motherboard, whereas an i5/i7 mobo was about £150GBP. I was going for a low-cost system, so I though top-end of the stage down from the newest tech would be a better idea. I've already swapped my mobo out for a slightly better one (the P5Q I have now (it's actually a P5Q SE, not a pro). So I thought getting a QX processor would be a good idea, but like you said the P5Q are FSB monsters (1600!!!!), so I may go for a cheaper standard quad core processor. Don't want Dual core unfortunately or my cost would be non existant . Aiming for the 45nm processors though, not the 65nm as they run quieter and cooler