Mavke
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Re:Howto tweak Fermi clock speeds using your NiBiTor software? - 2011/09/12 10:42
Well we detailed the clock domains a few time already on our forums, so I am just reposting one of my previous messages. Just to explain the Fermi works with the shader clock and the core clock is always half the shader. So when you look at the clock domains you will see that the last one is always the highest clocked and that is indeed the one to tweak since this is the 3D performance mode. Now you will see several fields and the shader clock is located in the 4th box and the memory clock on the 6th box. Next to that there are some other clock settings like what we call boosted shader clock.
As indicated above the different clock speeds with the red entry the actual shader clock, and the blue entry being the boosted shader clock, which you can see somehow as the old geometric delta that was used on the GeForce 7 series. What you need to take into account is, that when you increase the shader clock, you need to increase at the same ratio this boosted shader clock. Meaning in the above case if you want to go to 900MHz core, that is 1800MHz shader and as such keeping the same ratio as the default clock means 1889MHz for the boosted shader clock speed. 
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NiBiTor v6.06
