The card not working is nothing to do with UEFI BIOS, read the Q & As here and you will see a few people with MBs up to 10 years old using the same card, this long before UEFI became the norm.
What I would suggest you do and in the following order;
1: With the computer shut down, connect your screen to the appropriate video port on the MB, power up and see if you get any display, if you don`t you will have to shut down and remove the 290X, once you have video, install the drivers for the 290x, if the card was not removed, restart and see what happens, if the card was removed, shut down, replace the card and test.
2: If no joy with the above, with the computer shut down, remove the 290X, power up the computer to access the BIOS, once in the BIOS look to see if there is a setting that allows you to select a PCI-E add on video card as the Primary graphics adaptor.
3: Check to make sure that you have the latest BIOS available for your MB, how to check and update the BIOS info here