Have you tried putting the card in but connecting the monitor to the onboard......boot and see if windows detects the new card. After driver is found disconnect from onboard and plug into new card. You can leave computer on.
You may also have to use a different slot.
It is unlikely but possible your board has a jumper that needs to be moved to disable the onboard......again possible but unlikely..
The information on Computing.Net is the opinions of its users. Such
opinions may not be accurate and they are to be used at your own risk.
Computing.Net cannot verify the validity of the statements made on this
site. Computing.Net and Purch hereby disclaim all responsibility
and liability for the content of Computing.Net and its accuracy.