Shaderclocking the Geforce 8 -series

[SuperKeijo]

Has anyone else tried overclocking the shaders on an 8-series geforce with bios modding? It's a very simple operation, and if you already have a floppy disk installed, it won't take long to get started. I used these instructions: http://www.bjorn3d.com/read.php?cID=1060&pageID=3141 and left the core and memory frequencies stock, but increased the shader clock in steps starting from 1242 (default is 1188 for an 8800 GTS). When you overclock the card using software, the shader clock increases too with some kind of a fixed ratio and when you increase the stock shader clock 1 step, it will allways be 1 step ahead of what it would normally be. Next step is 1296, then 1350 and so on... So it is really easy finding out the max frequency for the shaders. Continue increasing 1 step for the shader clock and use your highest stable core clock and run 3dmark for a while to check stability. Remember to check the real frequencies with rivatuner to be sure what clocks you're running at. I could get my 8800 gts' shader clock up 2 steps and since my highest stable core clock is 621 MHz, the shader whent up from 1458 to 1566, over 100MHz more! After 1600 I started seeing artifacts in atitool and the performance didn't increase at all. 1566 is a 32% overclock from stock 1188. That's the equivalent of a 2,4GHz cpu running at 3,2GHz! With my core at 621, this was the improvement in the benchmark software we all hate and love so much! :

Would really like to know how high others can get their shaders, cheers.