z840 and PCIe problem?

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z840 and PCIe problem?

PostFri Apr 13, 2018 6:51 pm

I have the most preculiar problem:
I have a HP z840 dual-zenon Win10Pro PC with a Quad2-card. It shows the card in the windows Device Manager but Desktop Video doesn't recognize the card. I have tried with DV 10.12, 10.9.11 & 10.9.7. I have tried different PCIe-ports and different Decklink-cards(Quad2&Quad), the same result.
I have another z840 that is working without problem basically with the same setup. The one that is working as came to me a month ago and the problem child this week, so there can be some changes in the win10 installation but I belive the main drivers should be the same version.
Can anyone make any wild guesses? My is lining towards PCIe-ports and the motherboard drivers but it could be a Bios-problem.
Has anyone else countered the same kind of problems?

br markus

Glenn Sakatch

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Re: z840 and PCIe problem?

PostSat Apr 14, 2018 3:15 pm

This would typically be a desktop video issue, but you seem to have tried variations on that.

There is more than likely a PCIe slots configuration tab in the bios. You can probably set it for lanes and perhaps even disable or enable slots.

Does this computer have 1 processor or 2? That can affect how these lanes populate as well.

The fact that you have tried different slots is a bit troublesome as well, but I would compare the bios settings of both boxes.

Assuming other cards (Non decklink) have been tried and worked, and that the non working cards have been tried in the other box?
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Frank Wylie

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Re: z840 and PCIe problem?

PostMon Apr 16, 2018 3:01 pm

Also check the BIOS settings. I vaguely remember something about BIOS settings causing this type of problem, but cannot recall the exact setting(s) that impacted the card.
Frank Wylie
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Re: z840 and PCIe problem?

PostMon Apr 16, 2018 10:45 pm

Have you tried the HP Performance Advisor? It works on Z400s and Z600s so it may still work on bigger, later workstations as well.
John Abney is my name

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