this is off of insanelymac
All GeForce 8800 G80 Cards work. The new G92 based GTS and GT will not work! Please do not ask questions about if any 8x00 Series cards apart from the 8800 Series work in this post, simply the answer is no... if/when they do, I will be sure to update my post, and the easy-installer with the required files. When new 8x00 Series NVinject kext versions are released the easy installer will be updated, new fixes will be added too when/if available, and I have the time! This thread is only for support with regards to the working 8800 Series cards at the moment (8800 GTS, GTX). Thank you.
Wont be supported because of the chipset. As of now, OS X only supports up to the G92 chipsets, these are G94's.you can read all about it here
http://forum.insanelymac.com/index.php?showtopic=89149