i used msi kombustor for the benchmarks and stress tests.
Before the overclock, Furmark had 2274 points and 37 fps. Physx 3 fluids had 4956 points and 82fps. Lakes of titan had 38836points and 647 fps.
i finalized the overclock at a boost of +123 for core clock and +124 for the memory clock.
After the overclock, Furmark had 2585 points and 43 fps. Physx 3 fluids had 2277 points and 37fps. lakes of titan had 18982 points, and 316 fps.
And no, i didnt try to reinstall the drivers.