It boots after I disabled secure boot and removed all secure keys. thank you!
my system: XPS 8930 Intel 9900, 16 GB 2666 mhz DDR4, NVME M.2 original built upgrade to EVGA gold 650 watt PSU from 460 watt came with the system. added PowerColor Red D3vil RX 6600 XT Current Bios 1.1.16 my system worked with Nvidia 980Ti and 1070 before with any problem. I recently added PowerColor Red D3vil RX 6600 XT.  My system will not boot.  I just show the Dell Logo and stuck there.  I can press F2 and F12, but it just show the loading bar then go back to the Dell Logo.  I've clear Cmos and still have same problem.  I use to have bios 1.1.7, I thought new video card needs new bios.  However with 1.1.16, the issue persists.  Take out the card, and use on board HDMI, it will load to windows. Is dell xps 8930 only work with certain graphic cards? Please help. thank you!
XPS 8930, RX 6600 XT hang at Dell logo