- Oct 24, 2013
- Asus ROG Z690 Formula
- RX 6900 XT
- Mobile Phone
Is the igpu turned on? Could the system be trying to output video via the igpu and not your 6900xt in the preboot environment? Are your displayport cables capable of DP1.4? What BIOS are you using?No riser board. Card is plugged directly into the first PCI slot. Using the Vision D w/ 10850K cpu. Works flawlessly with the 5700 in the same port with display port monitors. All I see is black on boot with the 6900 unless I grab a spare monitor with HDMI. Unfortunately I have no other display port monitors to test with.
My old Radeon VII from ASUS used to give me trouble sometimes with outputting video on post, sometimes on post it wouldn’t display anything or it would display a garbled image, so I’d have to reboot the system once or twice for it to stop acting up. Sometimes upon wake from s3 sleep it wouldn’t display anything so I’d have to put the system back to sleep and wake it again for an image to display. Very quirky, and I never had that problem with an nvidia card or with my 6800XT.