http://www.overclock.net/t/1522651/disable-boost-and...
http://www.overclock.net/t/1517316/extract-and-flash...
If you prefer I will mod your bios for you to the specs you want.
Modding my bios has been well worth it.
Just to be aware tho, the pci-e cables you connect to the card, if they plain 6 pin, then they can only handle 75 watts, if they 6+2 pin (even with the 2 pins not connected) they can handle 150 watts.
Also i didnt follow those guides word to word, I want to keep my card reasonably power and heat efficient so I have not disabled the low 3d clocks. I have kept dynamic power saving enabled.