hello. This feels like a stupid question and I'm sorry that I have to ask it but searching has been fruitless.

I've put a used amd 5700xt in my tower. The machine boots and sees the card and lists it in system settings. When I unplug the hdmi from the integrated graphics and plug it into the card it nothing displays on the monitor. Its as if the card is turned off.

If I boot the machine with hdmi in the graphics card from power up the screen stays black. Removing the cable and plugging into the integrated port brings up the display on the monitor as expected

Before I rip it out and troubleshoot further, I wanted to ask if there was a setting some where that I need to change to tell the machine to start using the new card?

TYVM