[Solved] How to add more than 8 GPUs in Windows 10 [Step-by-step][FIX]

Until last week it was impossible to install more than 8 GPUs (graphic cards / video cards) from the same manufacturer (ATI or Nvidia) in Windows 10

<!> With this tutorial you can add 12 ATI GPUs (video cards) on one motherboard with Windows 10 as the OS.

How to do it? (Tested with 10 X ATI Radeon RX 580 4/8GB)

  1. Uninstall your ATI Drivers (using the latest version of DDU – from here)
  2. Install Crimson Driver 17.10.3 (download & release notes here)
  3. Reboot the computer
  4. Go to Start / AMD Settings:
  5. Now go to Gaming / Global Settings / and for each GPU change the GPU Workload to “Compute”:
  6. Start the mining software: 
  7. Enjoy!

36 thoughts on “[Solved] How to add more than 8 GPUs in Windows 10 [Step-by-step][FIX]”

  2. Hammereditor

    Is the DAG FIX update from AMD included with this solution? Does setting the workload to “compute” like you did turn the DAGFIX on?

    If so, excellent guide! I’ve been struggling to get my ASUS B250 mining expert to boot on a Linux (SMOS) USB drive or SSD. The mining expert I received just doesn’t like Linux. It resets itself right after I force it to load Linux. It only boots on Windows or the Windows installation drive I created.

    If this works, I can use 12 GPU’s on Windows with this board! I don’t have to replace it with two Gigabyte Gaming 7 270’s (or so).

    1. admin Post author

      Yes, the new driver works ok. I have in average 30MH/s per card.
      You should change to a mining motherboard like ASRock H110 Pro BTC+ (you do not need to make any modification it’s just plug & play for 13 cards).
      Or you can also check the new WOW card from ASUS B250 MINING EXPERT (supports 19 cards)

      1. Rewire

        Did you still have to patch the driver to allow for Bios modded cards or have they removed the signature check finally? All of my cards are modded.

  3. kosta

    I’ve tried to do it with RX550 2GB, but and ASRock H110 Pro BTC+, but I coudn’t to run more than 10 GPUs with troubles. Moreover, the system requires very many RAM – 8GB is not enough for 10 cards – is it normal? I have +-stable work with 9 cards on Cryptonight algo (at Claymore). But sometimes some card may disappear and the other system functions run very slow. Don’t know, I plan to try 16GB memory, but it looks so strange

  4. Arvydas

    Solved one problem, created another – how to regulate voltages now? MSI afterburner not working with new drivers

      1. Greedy

        Try to hardcode in claymore voltage values using -cvddc GPUvoltage0,1,2,3,4,5,6,7,8,9,10,11,12 parameter. I’m not using MSI AB because it likes to set it’s own, default parameters after system crash.

  6. DugTrio

    We have 12 RX570 4GB GPUs with custom BIOS running on Windows on 17.11.4 driver. MBO is ASRock H110 Pro+ and there’s 8 GB DDR4 plugged in. Rig is stable. Do the current drivers support 13 GPUs? One of our risers is faulty so we can’t test it until we get a new one. And thanks for the post man, helped a lot.

    1. Saniyo

      Hello, can you please make your system description. I’m really interested, I cannot launch more than 8 on ASUS Mining expert (which allows up to 19 VCs). Thanks.

    2. DugTrio

      Just an update if anyone would like to know, we have all 13 GPUs doing 380 Mh/s under Windows. Next step would be adding a 14th card via M.2>PCIe adapter, but sadly we are using M.2 SSD so that’s not an option.

      1. cryptod00d

        i’m running asrock h110 and can’t get more than 10 gpus to work correctly. If i add the 11th GPU then afterburner doesn’t report voltages or let me change anything to any of the GPU’s. I have msi rx 580 cards, windows 10 anniversary, help?

    3. Bitcanuck

      Few questions for you:

      1. Did you ever test any of the pci-e 1-4 or 1-3 expander cards?
      Wondering if we can use our existing mining boards.
      Currently we run Gigabyte H110-D3A s with 5 GPU, celeron and 4GB.
      2. Any idea if you need to bump up the CPU to get more resources?
      3. How do you find the stability?
      I also assume you’re running dual power supplies with that many cards.

      1. DugTrio

        1. We did not. However we know that the MBO needs “Above 4G Encoding” enabled. People reported those expenders work for AMD cards, but not for Nvidia. One guy reported he could only get them to work while powering them with primary PSU. Our MBO had everything set up out-of-the-box since it’s intended for mining, however yours might need some additional tinkering.
        2. Also Celeron here, seems to be enough. Double your RAM for more cards.
        3. Rock stable once you find the optimal clock rates for each card. If you experience instability (most notably system freezes) with lower clock rates, you probably have a faulty riser.
        4. Dual HX1200i connected via Add2PSU adapter. First one powering cards 1-6 (and their riser) and everything else, second one powering cards 7-13 (and their riser) and nothing else.
        5. Make sure you have 120+ GB SSD since you’ll need to set virtual memory to minimum of 70 GB for DAG files to work properly (at least in our case with 13 cards).

  8. Michael Thorkelsen

    Hi guys,

    I’m really hoping someone can give me an advice about my shopping list for my mining rig-
    until now I’ve managed to buy:

    Celereon (cheapest processor) socket 1151
    B250 Mining Expert
    10 x Nvidia 1070 TI gaming
    4 GB Kingston DDR4 RAM
    10 Vakind PCIe Riser Card 60cm (Molex) USB
    Fan for CPU (socket 1151)
    Ethernet card and sound card (cheapest ones)
    120 GB Kingston SSD

    My question is- What kinds of power supply should I get for 10 cards AND will I be able to run 10 x Nvidia like mentioned here or should I send 2 of them back and get two R9 cards instead and continue to fill up with AMD?

    I am also curious what more cables I need to buy for the power to the GPU’s?

    Thanks so much for your answer in advance, really appreciate any help!

    -Noob

  12. Turbo

    amazing write up and life saver now pulling 375 mhs with 12 amd rx580 and a custom bios this saved me hours of trying to figure out how to get all 12 up and running. much appreciated.

  13. dave

    Before using the adrenalin, (crimson block chain) my hash rate for 8 gpu are 28.5mh/s but cant run on 10 gpu rx580.
    after installing new Crimson Driver 17.10.3, my hash rat wnt down 17mh/s all GPUs (can run 10 gpu but all down to 17mh/s)
    and my after burner even the 4.4.0 beta 19 and the latest official wont run. all the burner wont run in 5 / 8 / 10 GPU.

    i need advice, can anybody help ?

  14. Leo

    I was running 8 cards fine without issue however I have 4 cards doing nothing and every time I tried to follow this even only adding 1 card so 9 gpu total it would give me the BSOD which is the blue screen that’s give error “system thread exception not handled” when i use 8 cards no issue at all.

    Any ideas?

    Thanka

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