I wonder if my sys. (C2D T7200, 667MHz FSB) can support 800MHz RAMs & gaming RAMs, knowing that the RAM would definitely run on 667MHz clock speed. Since the price of 800MHz RAMs are about the same, if not cheaper than 667MHz RAMs, I hope I would not regret getting the 800MHz ones.

Any 6400 users tried this before?

Also considering dual-channelling 2 x 1GB.