Is my DDR2 RAM bottlenecking?

+1.. Nothing left to add..

Even though it is just 400Mhz? I'm afraid that applications can't get the data stored in the RAM fast enough. But that isn't the case?

Your RAM is running at 800MHz, not 400MHz. Since your memory is DDR (double data rated), CPU-Z only shows it at 1/2 the speed. You take what it shows and times it by two to get your actual MHz.

Best answer selected by Remco32.