HP Z840, 2x Xeon E5-2667v3, 2x Tesla K80, 1x Quadro K4200

[Mionsz]

This post is just to sum-up and refresh the wild spread questions regarding HP Z840 workstation.

I have it currently in near power unit limit configuration but it runs like a charm.

HP Z840 and 1125w PSU.

• 2x Xeon E5-2667v3, 3.2 GHz, 14c/28t (28c total)
• 1x NVidia Quadro K4200 4GB graphic card
• 2x NVidia Tesla K80 Kepler, 24GB accelerator
• 8x 16GB DDR4 memory modules (128GB total)
• 2x SSD SATA3 512GB drives
• 1x HDD  SATA 512GB drive

The PSU handles this without any issues. I use 1x6 PCIE power connector per card (so 3of3 in total).

Key Notice: K80 cards introduced new power connector - it uses CPU type one not GPU 1x8 one.

This is were many people could not move forward from. Read the card specification. If need any help write here or a PM.

Also, as stated in one of the posts in forum, connect cards as follows, starting from the most power consuming on slot6, slot2 and slot 4 for the light weight one:

SLOT6: Kepler K80

SLOT2: Kepler K80

SLOT4: Quadro K420

Screen from configuration listing:

[DGroves]

you may also want to READ the power supply information that HP makes available for the x820/840 workstations

here's the link to the z840 documentation

https://h10032.www1.hp.com/ctg/Manual/c04490361.pdf

main docs link:

https://support.hp.com/us-en/product/setup-user-guides/hp-z840-workstation/6978842

[Mionsz]

@DGroves:

Thank you for reminding me about a very important thing, namely planning for expansion and basic calculations. I believe that reading the document below is essential - page by page:

"Site preparation guide": https://h10032.www1.hp.com/ctg/Manual/c04490361.pdf

From the document you will learn what should be taken into account first, namely the source supply voltage (which determines the continuous power available at the output of the power supply), in my case 230V.

In addition, the manufacturer presents a ready-made configuration estimate for various high-end graphics configurations. What you need to be aware of - if your card needs 300W, than the PCI-e itself delivers 75W and power connector, HP Z840 have 3x 6-pin PCIe connectors, accounts for 225W.

HP engineering team: kudos for you and the power supply design that would not allow to burn everything down, but just beep a power supply issue without booting-up. This helped me to discover K80 connector not being 8-pin PCIe but 8-pin CPU connector with polarity being switched. 

More info: https://www.nvidia.com/content/dam/en-zz/Solutions/Data-Center/tesla-product-literature/Tesla-K80-Bo...

[SDH]

Mionsz,

Thanks for your posts. There is a good forum member who is hoping for a Z8 G4 motherboard layout and those are on the inside of the left side case side that opens. Would you mind snapping a pic of yours and posting that to the forum thread HERE ?

I found a low-rez pic for him I posted but that was the best I could do... I'm a Z4 and Z6 guy but we don't have any Z8's here. I have no idea why HP stopped including that in the technical and service manuals. Thanks...