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DZ77RE-75K issue with accesssing bios through an HDMI video connection

I am running 2 "ASUS HD7850-DC2-2GD5 Radeon 2GB DDR5 VGA/DVI/HDMI/DisplayPort GPU Tweak Utilities PCI-Express 3.0 Graphics Card HD7850-DC2-2GD5" using crossfire and in order to access the bios using F2, I must disconnect the HDMI cable and use the DVI port with a VGA cable. If I try it with the HDMI cable plugged in and continue to pressF2, the computer will display the boot menu and continue to reboot.

Video tab settings:

Integrated Graphics Device: Always Disable

Primary Video Adapter: Ext PCIe Graphics (PEG)

IGD Primary Video Port: Thunderbolt

IGD Secondary Video Port: HDMI

No Video Detected Error Beeps: checked

Intel@ Graphics Performance Adapters: unchecked

PCI Slots tab settings:

PCI Latency Timer: 32

PCI Bus Limit: 256


Any advise about being able to boot into the bios while my video card is using an HDMI cable for it's output would be greatly appreciated.






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