Nvidia card change 7300 to Geforce 275

Hello
I changed my old video card for a newer in order to use all the resolution of my screen 1920X1200 and not 1920X1080, in my just installed 11.2, rebooted and got to log in graphic mode,looks good.
But isn’t.
It is working because the new card is seen as the old !
How can I get the new one to be recognized, and acces the newresolution ?

This is not possible. But it can still use the resolution of the older card. First rename /etc/X11/xorg.conf if any. Then restart X (or reboot if you don’t know how to).
What driver ar you using: nv or nvidia ?

If using nv, you should install nvidia. You will find many threads that explain how.

Once you have the nvidia driver installed, you have to reboot again and run nvidia-settings if necessary to set the resolution.