I'm experiencing black screens, crashes, and restarts after installing my RTX 4080 FE into my Z690 Classified.  I'm currently running the latest BIOS (2.08) and Nvidia driver (528.02).  I've also installed the firmware update from Nvidia to fix the black screen when the BIOS loads but as soon as windows loads it either goes black again or gives video and crashes/restarts shortly after.  I've done a lot of troubleshooting and can't determine whether this is a hardware or software issue.  When installing windows from scratch with the generic Microsoft driver loaded there is no issue with video, but as soon as Nvidia drivers are installed the screen goes black.  Is anyone else experiencing this issue?  I'm trying to decide whether or not it is an issue with the motherboard that warrants an RMA.  I have no issue with integrated graphics from my 12900k.

Same set up as me. Need help asap!!!!

Best thing to do would be to test the card in another known good working pc to verify the card is good. If you don't have another rig to test the card in then you could always take the card to a local pc shop to have it tested.

thought I fixed it earlier. Played 8 hours of gaming no problem . Now it’s doing it again after overclock . I went back in bios to change to default. Now it’s not picking up my display port monitor

Yeah might have too

What are your system specs to include make and model of PSU?

Reset the BIOs to default so that nothing is overclocked and retest. 
 

I9 12900k
Classified
4080 gigabyte
1000p6

Tbone16
I9 12900k
Classified
4080 gigabyte
1000p6

Have you tried both DP or HDMI cables during your troubleshooting?

Yes I have