I see in the link that you posted that there is also a patched 340.108 driver:
G03 = driver v340 = legacy driver for GT8xxx/9xxx devices (via a community user)
This would allow me to use the video card currently installed (GeForce 9600 GT) without the need to replace it. However, I also found the following thread:
pointing out that there could be problems with it. One of the users reports a kernel panic after a kernel update, but I’m a bit confused which driver they are actually using. Somebody recommended filing a bug report:
Create bug report. Nvidia drivers from repo had some troubles previously.
Has anybody installed the "G03 = driver v340 " in openSUSE Leap 15.4 with kernel 5.14.21-150400.24.69 and can please confirm that it actually works, especially without causing a kernel panic?
That would be highly appreciated.
Thanks!!