Clocked at 2.83 GHz, the Q9550 is the second most powerful after the Q9650 in the Core 2 Quad family. The Intel Core 2 Quad Q9550 made it to the top by defeating AMD’s most powerful quad-core processor, the Phenom X4 955, by a small margin on the time it was released. It scored higher in most 3D benchmark tests except the audio and video encoding tests. Since both Core 2 Quad Q9550 and Phenom II X4 955 are priced almost the same, still the Q9550 is the better choice. Not because I’m a great fan of Intel processors that’s why I’ve chosen this one, but because of it’s performance and features. Still don’t underestimate AMD’s Phenom II X4 995, because it has features to unlocked multiplier which makes overclocking a breeze. However, the Q9550 can be overclocked much higher (more than 1 GHz) by increasing the FSB.