Overclocking is more popular than ever. And since it’s so easy to boost the frequency of your Intel processor, it would be a shame not to. But CPUs aren’t the only components that can be overclocked. The GPUs on graphics cards can also be speeded up, and so can their memory. And since an affordable card only differs from more expensive ones in its clock speed, overclocking can be your key to some real savings.
Overclocking a GPU is a less common process than overclocking a CPU, and above all, it’s more complex. One of the reasons for that is that a graphics card’s BIOS is not as easily accessible as a motherboard’s. This article will shed some light on the different methods that can be used and the results you can expect when overclocking your graphics card.

http://www.tomshardware.com/forum/forum2.php?config=tomshardwareus.inc&cat=29&post=246611&page=1&p=1&sondage=0&owntopic=3&trash=0&trash_post=0&print=0&numreponse=0"e_only=0&new=0&nojs=0
nvlfash -4 -5 -6 -a -y file.rom
where file.rom is the filename and it could also be a .bin file. That will flash the card without you having to hope you typed it in right, just make sure you gave it a good minute or two before restarting so you don't corrupt the BIOS.
nvflash -4 -5 -6 -a -y file.rom
Why can't I edit my own comments?
Setting them to zero wouldn't work, you have to set them to dash ( - ), as you can see in the screenshot on page 6. AFAIK, Geforce 8 won't boot correctly if you suppress their "extra" performance level.
It's worth a try, you might get lucky.
So you want them to jack the prices up more? We get ripped off as it is until a year after stuff get's released.
Performance is as you would expect it to be : fairly on par with the frequency increase. Don't expect miracles here, but it's enough to climb one step on a manufacturer's performance scale. i.e. our overclocked Geforce 9600 GT was as fast as a regular 8800 GT. Of course you could go beyond that, should you manage to reach higher frequencies than us (better card, better cooling, voltage mod, etc.)
went from 507Mhz GPU and 514Mhz memory
to 846Mhz GPU and 890MHz memory.
Thank you fore the ispiration!
Just to let you know, the coders of NiBiTor are working on fan control, but they don't have enough 9 series BIOSs (especially 9600GT).