HP Z840 UEFI video BIOS nVidia K5200

[Airborne9521]

Hi,

      I have an HP Z840 with an NVIDIA K5200 video card. The problem I have is that when I enable  video Bios as UEFI the system won’t boot, blank screen. I then have to boot with another video card (GTX 1050 TI) to revert back the BIOS setting as legacy.

The K5200 is an HP.

[DGroves]

i suspect the k5200 should support UEFI/legacy , the 1050 is a legacy/UEFI device

install both cards while in uefi mode (with the 5200 being a secondary display device)

does the OS see both cards?

use a program like GPU-z to check both cards

[Airborne9521]

Hi,

       the K5200 specs says the card support UEFI. I had a K6000 before that was working in UEFI mode in a Z820. When I would take that card in a Z840 I would get the same problem, no boot and blank screen in UEFI mode.

BTW, I get the same problem when I enable Secure boot.

 Thanks.

[ha_mann]

I've the same problem and I bought a new motherboard due to this error.
Re: Secure Boot on HP z840 - HP Support Community - 8115570
I thought that motherboard is broken after testing two graphics cards (K5200 & M5000) with the same result.

[Airborne9521]

Hi,

      yes very strange same card (HP K6000 and K5200) that works in UEFI in a Z820 and not in a Z840. I tried it in 3 differents Z840 with the same result. Even stranger that a low end PNY GTX 1050 TI) works.

[ha_mann]

you are right, I borrowed a NV gtx 1060 and I can start normally with secure boot, but not with Original Nvidia Quadro's o.O

[Airborne9521]

The K5200 is a supported configuration with the Z840. I really wonder what we are missing here, a BIOS parameter, video BIOS update?

[DGroves]

you need a clean 64 bit windows, INSTALLED with secure boot enabled in the bios and GPT format enabled leave CSM disabled in the bios

you may also need to reset/remove the existing secure boot keys from the bios using the reset key option once done then try setting the video bios to uefi mode and proceed with a clean GPT windows install

https://www.youtube.com/watch?v=KnBaHwwI7D4

[Airborne9521]

Hi,

       there is no possibly to boot from anything when video is set to UEFI mode (or secure boot is enabled). No post, no BIOS message, nothing just a blank screen. So no way to install Windows 10, beside, Windows 10 is already installed in GPT / UEFI mode. In order for me to bring back video legacy mode I have to install a GTX 1050 TI so I can access the Workstation  BIOS. I’m open for any suggestions.

 Thanks.

[ha_mann]

HP PCs - Secure Boot (Windows 10) | HP® Customer Support

Secure Boot settings for business notebooks and workstations

Hello,

after the step highlighted in red, the boot screen where I must enter a random PIN, does not show up with my original HP Quadro M5000. > Due to, no signal! (But it does with an GTX 1060)

6. Select the Main tab, select Save Changes and Exit, and then click Yes to display a PIN

7. Type the PIN, and then press Enter.