By default CML8GX3M2A1600C9B works at 800MHz. At this speed, we could not tighten the timings any further from 9-9-9-24. If you want memory to run at 933MHz, you'll have to increase the voltage from 1.5V to 1.65V.
On the following pages, you'll notice that overclocking the memory from 800MHz to 933MHz improved the gaming scores up to 14 percent. This number is closer to 30 percent when you compare 666MHz and 933MHz memory.