HP xl190r gen9 blade server GPU/Accelerator riser board and power cable P/Ns
from 汏啲菘癙βèň菿傷
This blade server support up to 2x GPU and it comes with many configurations. I happened to do the research and here is what I learned:
First off, riser boards. It has 4 variant of GPU riser boards:
Single GPU w/ FlexLOM, P/N: 804548-001 798184-B21 800368-001(spare) This is the board with only 1 16x PCIE slot for the GPU. The slot is connected to CPU1. A white PCIE 6pin power receptor is present on the board.
I'm assuming this is because the board itself might not supply enough power when both GPU and FlexLOM slot are populated.The power supply is required when the PCIE slot is populated. This riser, paired with its cage, must pair with a 2U height left side riser + cage (I couldn't find a P/N at this moment, but it has to be 2U height not the half U height version for dual GPU risers mentioned below.)Dual GPU w/ FlexLOM, “split CPU” version P/N: 800373-001(spare) This board has 2 16x PCIE slots in rear/front configuration. The rear one is connected to CPU1 and front is connected to CPU2. Not ideal, better to avoid. This riser + cage configuration, along with all dual GPU risers, must pair with the half U height left side riser + cage. P/N: 778151-001 800370-001(spare)
Dual GPU w/ FlexLOM, GPU-direct version, P/N: 800374-001(spare) Same riser layout as above, but both slots are connected to CPU2, providing more inter-GPU PCIE bandwidth. Everything else are the same.
Dual GPU w/ FlexLOM, GPU-direct with re-timer, P/N: 828927-001(spare) The riser above with an additional re-timer.
Now, GPU power cables. The cable connects to the bayonet board on one end and to the GPU on the other end. There are many P/Ns:
Single GPU cable P/N: 800288-001 808852-001(spare) Officially, there is only 1 cable for single GPU configuration. Note that this cable has the white 6pin power connector to the single GPU riser board as well. Since officially each GPU can only draw 300W max, this cable only has 1x 8pin and 1x 6pin PCIE power connector for the GPU, not dual 8pins. So, even with the single GPU riser, I think it might be better to use one of the cables mentioned below, so there are least 2x8pin connectors for the GPU.
Dual GPU cable pair, P/N 825637-001 825636-001 811571-001(spare) Two cables, but often sold as 1 unit. Cable 1 connects to the bayonet board, and provides 1x8pin EPS for the front GPU and a connector to the front cable. Cable 2 connects to this and the rear GPU 1x8pin EPS.
Dual GPU cable pair, P/N 825634-001 825635-001 808852-001(spare) Same two cable design, but provide both GPU with PCIE 1x8pin and 1x6pin.
Dual GPU cable, P/N 800287-001 808852-001(spare) Single cable, provides both rear and front GPU 1x6pin and 1x8pin.