HP Z820 has no display with the Sparkle Intel Arc A380 ELF GPU?

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Hi, I own a HP Z820 V1 workstation. I am unable to enter the serial number on the HP website and have the machine be recognized. 

I decided to upgrade from the currently working Nvidia Quadro 4000 (requires 6 pin external power), to a newer Sparkle Intel Arc A380 ELF 6GB GDDR6 GPU. The Amazon link is here :< https://www.amazon.com/dp/B0C74RQV9K?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1

Sparkle Intel Arc A380 ELF 6GB GDDR6 GPU product sheet :< https://www.sparkle.com.tw/en/A380-ELF

This card has no external power connector onboard. 

I have reviewed the HP maintenance and service manual (page's 89 and 90) found here :<

 https://h10032.www1.hp.com/ctg/Manual/c04205252.pdf

I am unable to get any sort of display, (no POST etc), when the HP Z820 is powered up with the Sparkle Intel Arc A380 ELF is installed into slot 2. 

When looking at the BIOS setup settings. I see no setting/s related to 'slot width, set to x8x8', is there such a setting? 

I have tested the same card, Sparkle Intel Arc A380 ELF in a mid tower Gateway DX-4850 i5 and it works fine. Can you please help me understand why this is?

-Greatest Hopes😶

[DGroves]

this card is a very poor choice for older non UEFI systems as it does not support older Legacy (pre UEFI) systems

you might be able to get it to display by entering the z820 bios and setting the video option to "EFI" which was the precursor to UEFI (change nothing else) and for gods sake don't touch the compute settings!!! doing so will render the motherboard useless leave it disabled for all of the PCI-e slots

do note that setting the video rom option to EFI will also disable any boot screen information meaning the display will remain blank till windows loads

last, even if you can get a display,.................. the card will be extremely slow due to the z820 not supporting the resizable bar option in it's bios which the intel Arc series video cards require/use

personally i would not play with the arc card(s) in this system., you will be better server with something like a nvidia 1660 up to a 2070 TI /2080 non TI anything faster than a 2080/2080 TI will be restrained from it's peak speed due to the z820's  supported cpu's not being able to feed the video card data at a rate that it wants/needs

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@DGroves, thank you very much for your prompt, informational and very helpful reply.

I went into BIOS setup and set the following > Advanced > Video option ROMS = EFI

Before removing the Nvidia Quadro 4000. Then selected to "Save changes and exit".

There was then no further display, no viewable POST and the machine had the following symptoms of :

Red Power LED blinks six times, once every second, followed by a two-second pause. Six beeps.

As per page # 146 of the Maintenance and Service manual.

So I felt quite nervous and thought to power the machine completely down.  Then  I removed the Nvidia Quadro 4000 and installed the Sparkle Intel Arc A380 Elf into slot 2.

I powered up the machine and after about 30 seconds it will POST the BIOS revision information etc....

You are certainly correct about "setting the video rom option to EFI will also disable any boot screen information". 

I would like to ask you about this HP manual titled, 'Installing UEFI-based Windows 7 (x64) on the HP Z420 HP Z620 and HP Z820 Workstations' :< https://h10032.www1.hp.com/ctg/Manual/c03489370.pdf

It says in section 2. d. Change the state of all embedded controller Option ROM selections from Enabled to EFI.

I think they mean Legacy not Enabled.

Anyways, will setting the following in BIOS setup:

PXE option ROMS = EFI

Mass Storage Option ROMS = EFI 

Have any benefit?

[DGroves]

if you want a non working system, feel free to ignore ny instructions not to change any other bios settings other than what i said to try for your video issue

and note that the quadro 400 card is non uefi compliant so  it will not work when the z820 video rom is set to efi

the reason windows 7  had other changes to EFI was mostly to enable limited nvme boot support using specific nvme model ssd's nothing video related

as to changing PXE and mass storage settings go ahead but don't ask for support as the last time i looked a ethernet rom and a storge rom has nothing to do with video

look i understand you wanting/hoping to somehow make you intel card work with a older system but sometimes it's just not possible the Intel video card was designed from the ground up for current computer hardware not older legacy hardware

the z820 was released in 2012 and end of life 2017 it's still a cool system but the truth is that a HP cheap z240 system with a xeon v5 cpu or any AMD 5600 cpu based system is going to out perform a z820 unless your program requirement makes use of 256GB ram and 18 cpu cores

if you want a cheap working video solution for your z820 get a used nVidia 2070 ot 2070 TI