Graphics Card Overclocking
Thanks to motherboard and VGA manufactures, overclocking has become such an effortless task, giving literally anyone the chance to overclock their components with very little risk.
When it comes to overclocking graphics card we use and recommend two program - for ATI cards you can't go past ATI Tool and if you're on the other side of the fence and using an nVidia card the Coolbits 2 registry hack is it. Both programs offer an Auto Overclock feature which is what we use.
The Gigabyte X1800XL was increased from 500MHz on the core to 577MHz and the memory remained the same (at 1GHz DDR) due to our overclocking tool limitation.
We saw a nice performance increase when it came to overclocking the card almost hitting 7500 Marks with just the GPU overclocked. This then puts us well and truly in front of the 7800GT.
Doom 3 saw a slight increase in performance which again begins to significantly close the gap that the 7800GT had in the earlier benchmarks.
With the CPU limitation we see no extra performance when we overclock.