Aorus Z790 Pro X - do i need to get the 6750GT, or will the display work fine coming out of the motherboard?

The install dies on the below text, then i get the stop circle (link to pic : https://cdsassets.apple.com/live/7WUAS350/images/macos/macos-startup-circle-with-slash-circle-with-line.png )

23:639 00:200 AAPL: #[EB|STOP] 0x16 23:847 00:208 AAPL: #[EB|H:IS] 0 24:047 00:199 AAPL: #[EB.G.CS|-?] Ok(0) 24:236 00:188 AAPL: Displaying boot failure graphic for 10 seconds... 34:449 10:213 AAPL: Displaying text console for 10 seconds...