German Computerbase still has some Core 2 Quads in their benchmarks. I had a look and it seems that a 3 GHz Core 2 Quad ~ AMD Phenom II X4 and beats the AMD Athlon II X4 which is pretty impressive. The Q6600 is ~ AMD Athlon II X3. So yea it looks like there is still some life left in this socket. Only trouble is that you can get a new Athlon II X4 for ~ 100 bucks while a Q9550 will likely cost you more?