I've bought a new motherboard for an SLI upgrade, a P5n32-SLI. The thing is only the P5n32-E SLI takes core 2 duo. So basically, I'm stuck with a good board but it only takes up to Dual Cores. My second board is a P5LD2 with a e6600 (2.4 Ghz O/C 3.0Ghz) with a 9800GT 512mb and an other one sitting in it's box. I looked for the best cpu's for each board, and I was wondering which one would be better. There's the Extreme ED-965 for the SLI board, and a Core 2 Extreme X6800 for my older board.. Thanks for your help !