Gerard said:
If you want to change a graphics adapter, you should first switch
it's setting back to common VGA.
That won't accomplish anything.
Only then, remove the old card and install it's replacement.
(Which will also boot into VGA setting; about the only thing you
can be sure, every card supports
No, after the old drivers are uninstalled, the standard VGA driver that
comes with the OS will drive the card in that mode until the new drivers
are installed.
Next, install the proper drivers for the new card and select the
setting you need.
Then you can remove any old drivers.
Sorry, but that's backwards. You always uninstall the old drivers
first, so there is no possible interaction between the current, or "old"
drivers and the new drivers for the new card.
Even when simply updating graphics drivers for a video card, the current
version should be uninstalled, then the new version installed.