For future reference and those who encounter similar issues, I found an unlisted/unsigned vbios on TechpowerUP that worked to correct this issue. [URL] The other 2 bios on TechPowerUP did not work.
My GTX 1080 is severely underperforming with the memory clock stuck at 405Mhz. I've tried reinstalling the drivers, DDU in safe mode, flashing the card (Saving the original bios as well) with others found on TechPowerUp. So far I have been unable to fix the issue. The GTX 1080 is performing worse than a GTX 1050ti at the moment. I have cleaned the PCI-e x16 connector, made sure the 8 pin power was connected correctly and used MSI Afterburner to no avail. If someone could send the latest BIOS for me to try that would be helpful.
XPS 8920, GTX 1080 stuck at 405MHz memory clock