I suggest NOT to use nvidia drivers from nvidia website.
Instead use this :
http://www.tonymacx86.com/287-apple-issues-special-os-x-10-8-2-update-new-macs.html
This new update is tricky to install, but it has NATIVE nvidia drivers which works perfectly with GTX660 (NO slow boot !)
To use the update :
- download it from apple website
- modify you smbios.plist with these values before launching the update
<key>SMfamily</key>
<string>Macmini</string>
<key>SMproductname</key>
<string>Macmini6,2</string>
<key>SMbiosdate</key>
<string>10/25/2012</string>
<key>SMbiosversion</key>
<string>MM62.88Z.006C.B05.0802291410</string>
- Launch the update
- Verify you have GraphicsEnabler to NO in your org.chameleon.Boot.plist
- shutdown
- install Geforce GTX660
- reboot
- restore your favorite smbios, and use Multibeast to restore audio
- warning : TRIM (and perhaps other things) may not work anymore. (for me it's just TRIM.. waiting for the next Multibeast !)