loveha
What I would do is do a bare bench test outside the case on the MOBO box. Just to make sure it's not something else.
If it boots with bare essentials, then start adding things in one at a time like the riser cable till it doesn't.

Merciless_Rick

Evanmareyes
As title states I have a new EVGA x570 Dark that I’ve tried installing my 3080 12gb FTW and older 1080ti in the board with two different riser cables and I cannot get past the d6 code.

Steps I’ve taken:
1. Clear CMOS - no change
2. pull battery from the motherboard - no change
3. Try different graphics cards and or riser cables - no change

I have not tried reflashing the bios as it’d be difficult for me to get it on a usb, but that’s my next step.

Anyone else have any ideas on what else I should be trying? I guess I can also pull everything out of the rig to try a pcie card slotted directly, except it’s a custom water build….

read the post right under yours on the main forum page
TLDR
try an hdmi cable...even if your DP cable is fully plugged in, try an hdmi
there is an issue with 30 series cards and some type of DP version verification that certain monitors do
boot up with HDMI and then update your 3080 bios using X1
if no update available, head over to the 30 series forums and you should find a pinned post about this issue with a link to an Nvidia released update
Ive had this issue occur on my 3080ti and my 3090 with this board