Ok had a chance to take a break and whip out my macbook.
I am currently using the 302.59 drivers:
Image
The inf file has device id 0FD1 for the geforce gt 650m. You can simply update this to apple's which is 0FD5.
Download the drivers that have support for the gt650m. For example i used the 302.59 from laptopvideo2go.com:
http://laptopvideo2go.com/drivers/win7x64/302.59
Next go into the directory with the nvwi.inf.
Open nvwi.inf with a text editor such as notepad.
Do a find & replace on
0FD1
And replace with:
0FD5
For example this section:
NVIDIA_DEV.0FD1.01 = "NVIDIA GeForce GT 650M"
should now be:
NVIDIA_DEV.0FD5.01 = "NVIDIA GeForce GT 650M"
There are quite a few entries that need to be replaced (not just this) so all of them need it changed.
Next from the device manager (devmgmt.msc) right click the nvidia card, and go to properties and driver tab and update driver. Manually chose the location and chose the directory with the nvwi.inf file. It might automatically list the correct graphics card or u might have to uncheck 'display devices compatible with hardware' I forget. If you have to show them all chose NVIDIA GeForce GT 650m (its way down near the bottom).
And that is pretty much it.
If you want you can donwload my modified inf at:
http://box.houkouonchi.jp/nvwi.inf