the x6800 has only 4mb too, unless your talking about the qx6700. Of course the qx6700 has 8mb becuase it is a quad core, but like alot of us have been saying quad cores arn't supported very well right now. Dual cores are just starting to have support with games. Which is why the benchmarks i posted earlier showed that they were getting the same performance at the same speed on current games like oblivion . Also, for some reason, the dual cores were getting a few more frames over the quad cores if you remember the benchmarks.