Specs:msi z390 mag tomahawk (running latest bios)i5 9600kx2 8gb corsair 3200mhz ramcorsair 850 gold psuHi there!Last week I purchased a Gigabyte RTX 3080 OC 12G from Amazon. When I mounted the card and first booted I didn't get any signal on the display, I tried both HDMI and display port.
I know it's not the PSU because I have a Corsair 850 gold with x2 8pin cables which the card requires.So I connected the display port to the integrated graphics port on the MB and managed to post and get into the BIOS. I checked the MB board and so my surprise the card was detected fine. I then continued to boot into Windows using the integrated graphics. I checked device manager and the card was there in display adapters, in fact, I was able to install nvidia drivers so the card is definitely being detected (put with no video output). I proceeded to open GPU-Z and to my suprise in the VBIOS section, it had "Unknown".