Aurora R7, RX 6750 XT upgrade issues

Assistance needed. Just installed a new RX 6750 XT into my Aurora R7. No issues with fitting it in there just a bit larger than the 1080 Ti that I ordered with the computer. I do not have any power issues since the R7 came with a 850w PSU. I have tried to get the computer to boot up several time now, but it will not leave the Alienware splash screen. I have tried to go into the bios from this location but every time I select F2 the computer just sits there. I have swapped back to the old 1080 card and have no issues with boot up into windows. I can even get into the bios with the old video card. I have the most current bios firmware load on the computer 1.0.26. Any suggestions or help would be greatly appreciated. Thanks.