Intel dz77ga refuses to output video signal to bios via pcie without legacy boot

Question

Iron

Good day!
I have a wonderful Intel dz77ga-70k board in which, by default, UEFI and Legacy boot are checked in the BIOS. When legacy boot is disabled, the monitor does not turn on during uefi-bios boot, but turns on in windows itself (windows is on a GPT disk in EFI).
The monitor is connected to an nvidia gtx670 video card plugged into the pcie. The motherboard has an hdmi output to connect the monitor to the video card built into the processor (intel hd graphics 4000) - so if the monitor is plugged into hdmi, the uefi bios will be visible, but I would like to watch it through my nvidia card.

All this is started for the sake of experiments with secure boot, when enabled, the legacy boot is turned off and the BIOS is not visible.

How to make it so that the built-in video is not turned on and the image is displayed through the pcie video card?

ps I photographed all the BIOS menus, here they are: imageshack.us/g/825/oh21.jpg/

Answer 1

So, googling what could be the problem, I came across the fact that for UEFI motherboards there must be the same UEFI video card.
I got to my video card through the official nvidia program and found the following there:

Reading adapter firmware image…
Image Size: 97280 bytes
Version: 80.04.31.00.4F
~CRC32: D1E0F59C
OEM String: NVIDIA
Vendor Name: NVIDIA Corporation
Product Name: GK104 Board — 20040005
Product Revision: Chip Rev
Device Name(s): GeForce GTX 670
Board ID: E113
PCI ID: 10DE-1189
Subsystem ID: 1462-2840
Hierarchy ID: Normal Board
Chip SKU: 325-0
Project: 2004-0005
CDP: N/A
Build Date: 05/21/12
Modification Date: 07 /11/12
UEFI Support: No
UEFI Version: N/A
Sign-On Message: GK104 P2004 SKU 0005 VGA BIOS (HWDIAG)
MSINV284MS.101

Thus, this video card BIOS does not support UEFI. But I did not give up and went to the manufacturer's website, where I found that my bios was the last one, got to the forum, and there was a miracle !!! there, the manufacturer makes bios on request with UEFI support, the only thing you need is to specify the serial number and upload the original video card firmware.
After that, Legacy normally turned off in the BIOS of the motherboard, everything works with a bang!

Answer 2

The new motherboards have a separate item where it is indicated through which output to output the video signal when the system boots, in Russian it is called approximately the same, everywhere there are not many different ways, but the essence is the same. There, by default, the hdmi value, which will need to be rearranged to vga or dvi.
PS I remembered more precisely - the video output item, in the description, the choice of the video output that outputs the signal first.

Answer 3

Here you have this item on the 4th screen - Primary Video Adapter is set to Auto, there is a trick in it, you will need to select the necessary video card there.