Right so I have been pondering of going quad for a good while, I guess more so 'cus I want a new toy. Now obviously if the cash was there I'd snatch a 920 D0 put it on a gigabyte/evga board but the cash is not there atm So I'm thinking Q9550, but today I saw a Q9450 bargain priced, a real steal so I was thinking whats the diff between the two. From what I can see the only diffrence is the multiple 8.5 vs 8.0? Is the Q9450 on same E0 stepping as the Q9550 or are they diffrent there aswell? 8x500 = 4.0 ghz so 2000 FSB to reach 4.0 ghz..quite high but could be doable. 8.5x471 = 4003.5mhz, 29x4 = 116 FSB in diffrence(1884 FSB vs 2000 )..not a whole lot. I mean ~50 bucks for a 2ndhand Q9450 E0 ( if there is any? ) sound to me like a bargain. Would be nice to hear some other people who pondered this before.