Graphics card not being recognised

[I need help now]

I don't know if my case is unique to anyone others, but here goes.

I recently purchased a zotac ghz edition 780ti to replace my sapphire 7970 ghz edition. I just tried to install it but the computer would revert to its on board graphics, and not display the device under device manager, nor would it let me install drivers. My bios is the version the motherboard came with (990FXA UD3) and I know I should update and that will probably work, but out of nowhere my Ethernet socket in my motherboard has stopped functioning (or at least stopped flashing and I lost connection to the Internet). When I was experimenting in the bios looking for options regarding updating the bios, the only thing that came up was q-flash, but when I tried to see what it would do did not function when I pressed on "choose bios from drive" even though I didn't have a bios, in any of my drives. Please help this is urgent and extremely frustrating.

 

[Coolboy951]

I would uninstall the old drivers with DDU driver uninstaller if that does not help go to bios and switch UFEI mode to LEGACY mode

 

[I need help now]

I would uninstall the old drivers with DDU driver uninstaller if that does not help go to bios and switch UFEI mode to LEGACY mode

Thanks, but after successfully running ddu driver uninstaller once, it has ceased to work, with error "the version of this file is not compatible with the version of windows you're running.check your computers system information to see wether you need Ann x86 or x64 version of program". I am running windows 7 64 bit

 

[Coolboy951]

delete the DDU you have and download the right version From GURU3d