my bad I got it confused with optiplex 790.  780 has legacy bios only according to this video.  there is no option to choose UEFI vs legacy in boot mode, therefore it is legacy only.  The bios interface looks like the primitive UEFI in 790, but the boot operation is still 100% legacy. [IMAGE]780 bios [URL]
I'm trying to put a Xeon X3360, a GTX 1660 Super, 500 watt power supply, and a wifi card on a Optiplex 780 Motherboard. However a GTX 1660 Super needs UEFI to work and I am not sure if a Optiplex 780 Motherboard supports it. If it does not, what is a cheap DDR3 motherboard that will?
Does the Dell Optiplex 780 Motherboard have UEFI?