I am using LiNX benchmark to check the performance gains made by OC'ing. The benchmark gives me 19GFlops on stock settings on an AMD FX6100 @ 3.3GHz.
Increasing the multiplier and taking the CPU to 4.2GHz gives me minimal gain in benchmark scores (about 20GFlops).
However, when I overclock the system bus from 200MHz to 230MHz while reducing the multiplier to bring the cpu clock back to stock speeds i.e 3.3GHz. The score jumps to ~23GFlops and I can see the improvement in framerate and gpu usage in some games.
What is the bottleneck? Memory? Because I am using only one stick of GSkill Sniper 4GB memory. Overclocking the NB didn't give me more performance.
OC'ing HTT by 30MHz gives me more performance gains than OC'ing CPU by 1GHz.
AMD FX 6100
1XGSkill Sniper memory 4GB
HD Radeon 7850
Gigabyte GA-78LMT-S2PT Motherboard