HP Z8 G4 Post error with 2 X Nvidia A5000 Gpu

[andrew_ness]

Hey, I have a Hp Z8 G4 Workstation. I think it's an early gen. I am having new graphics card issues.

I have upgraded the bios to the latest.

I have purchased 2 x Nvidia A5000 Rtx gpu's.

Randomly, when both graphics cards are inserted, I get an error every few days or so, or once a week.

I get this:

POST Error

928-Fatal PCIe error.

PCIe Completion Timeout error detected on Slot 2. B:2D D:0 F:0

Have also got it on Slot 4. B:15 D:0 F:0

and

Slot 6. B:99 D:0 F:0

I have tested moving cards in different slots.

Also tried in the bio making the speed slower.

Still get the error.

So far, just using 1 gpu seems to not display this error.

The error might have every few days, so it works for a while, then error.

Thanks for any help.

[DGroves]

many things can cause a pcie-928 error

Bios

drivers (video and other installed card drivers)

bios PCI-e slot settings

poor pci-e slot connections (usually due to a improperly seated card)

system unable to provide the necessary 75 watts to each video card (very unlikely on a Z8 based workstation)

however you could still have a power related problem:

this workstation is approved for dual 250 watt cards (quadro p6000) however i don't know if this setup requires one of the two upgraded power supplies the stock supply is a 1125 watt with upgraded 1450 and a 1700 watt units available

checking the HP sites specs for this model shows that the 1450 supply is used when dual 250 watt cards are installed

see attached pdf

[andrew_ness]

Operating system Windows 10 Pro 64-bit Version: 19045.2728

Microprocessor 2 x Intel(R) Xeon(R) Gold 6248R CPU @ 3.00GHz

System memory 96 GB

My chassis has a C20 PSU appliance connector:
HP Z8 G4 90 1450W World Wide Chassis 100V/20A  referred to as 1450W (C20)
HP Z8 G4 90 1450W APJ Chassis 100V/20A  referred to as 1450W (C20)
HP Z8 G4 90 1700W 200V Chassis 200V/10A  referred to as 1700W (C20)
HP Z8 G4 90 1700W 200V APJ Chassis 200V/10A  referred to as 1700W (C20)

[andrew_ness]

Do you think having a dual gold cpu + 2 A5000 would be too much?

The sticker on psu says:

50/60Hz

100V~ / 16A

115-127V~ / 16A

200-240V~ / 10A

[andrew_ness]

Thanks for your comments. I have moved around the cards multiple times into various slots. Maybe I need to look at drivers / bios updates if there are any more. Thanks