Q9550 & Q9300

AMW1011

Distinguished
The Q9550 has twice the cache, 6mb vs 12mb, and is at a higher clock speed, 2.5Ghz vs 2.8 Ghz.

If you overclock then there is all the difference in the world as the Q9300 has a tiny 7.5 multiplier which will limit overclocking horribly.