Even with the power of the AMD Athlon X2 and Intel Extreme Edition processors, we still find ourselves hitting a CPU limitation in a lot of our benchmarks. That is, the graphics cards have more performance to give but the processor is letting the team down.
By overclocking the processor we can see what kind of a performance increase we get. When something isn't CPU limited the performance increase isn't all that major but when we do have a CPU bottleneck, every MHz extra we can get can show us an excellent jump in performance.
The Athlon X2 3800+ was increased from 2GHz to 2.35GHz with a slight increase in the front side bus utilizing the stock X2 HSF.
We can see at the lower resolutions both cards get a nice performance boost, at the higher resolution the performance difference in the overclock is a lot smaller.
3DMark05 doesn't gain as much with the CPU overclock.
Far Cry at the lower resolution sees an excellent performance increase over 5 fps on both cards.
* Latest Pricing of the Radeon X800GT *