H81 Pro BTC 2.0 : How to get 6 GPU

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   Hello.

I just bought a second hand H81 Pro BTC 2.0 mother board and I plug 5 AMD Vega 56 on it.

I'm using a CoolerMaster V1200 Platinum PSU.

Each graphic card is powered byt its own 2x8pins PCI-Express cable and is plugged to a PCI-Express 1x to 16x USB riser

Motherboard MOLEX dedicated to PCI-Express are also plugged (I use 1 cable from the PSU)

When I use PCI-Express port #1 to #5 on the mother board, only GPU #2 to #5 are recognized by the OS (mmpOS based on Ubuntu).

I have to plug GPU on PCI-Express port #2 TO #6 to see all my GPU and to mine with it.

But I want to add an extra GPU so how can I make it possible ?

Thanks.

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mikebzh44 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 03 Jan 2021 Status: Offline Points: 3	Post Options Post Reply Quote mikebzh44 Report Post Thanks(0) Quote Reply Topic: H81 Pro BTC 2.0 : How to get 6 GPU Posted: 03 Jan 2021 at 8:56pm
	Hello. I just bought a second hand H81 Pro BTC 2.0 mother board and I plug 5 AMD Vega 56 on it. I'm using a CoolerMaster V1200 Platinum PSU. Each graphic card is powered byt its own 2x8pins PCI-Express cable and is plugged to a PCI-Express 1x to 16x USB riser Motherboard MOLEX dedicated to PCI-Express are also plugged (I use 1 cable from the PSU) When I use PCI-Express port #1 to #5 on the mother board, only GPU #2 to #5 are recognized by the OS (mmpOS based on Ubuntu). I have to plug GPU on PCI-Express port #2 TO #6 to see all my GPU and to mine with it. But I want to add an extra GPU so how can I make it possible ? Thanks.