Question GPU fans spin very loud on startup ?

Jan 12, 2023
I have a GTX 780 Ti, and I've had it for about 2-3 weeks. It was working normal before I switched out my motherboard in my Dell Optiplex 7020 MT. First, it would boot normally, but after booting into windows, before it got to the lock screen, it would go to a blackish-grey screen. I've tried replacing the motherboard, switching power supplies... nothin.

Now, when I try to boot, on startup, the fans immediately spin up to 100%, which i've had happen before but it was only because my power supply wasn't turned on. I can't figure out my issue. I am currently using a Quadro K5000 now as a backup until I can get my 780 Ti working.

CPU: i7-4790S
GPU: GTX 780 Ti