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.
3DMark03 shows us a very minor increase in performance when our X2 is given a slight overclock.
3DMark05 also shows quite a small increase in performance with our CPU overclock.
Far Cry at the lower resolution does give us a little increase but with 1600 x 1200 offering a playable resolution you wouldn't play at 1024 x 768.