How to Set More than Limit.
For Geforce 256 SDR & DDR after Reg. coolbit.reg  (Rename coolbits.txt to coolbits.reg and Double click it)
In  Display Properties > Advanced > Geforce > Additional Properties > Hardware Options
You can set Core Frequency Max @ 150 MHz.  How to Expand it. ?
1. Set Core Frequency to 135 MHz , Test , Check Apply when startup box  and Apply it.
2.. Run Regedit
3. Find for  Krusty  You will see the Number of Krusty
     And look at Bart     Set Bart Number to same as Krusty Number.   
4. Quit Regedit and now you can set Core Frequency to 170 MHz Max .
Screen Shot
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