Can't get my rig working with 7 x RX580

kbikbi Member Posts: 1
Hi,

I just bought my new rig but I cannot make it working.

Here is my setup :
- Motherboard : MSI Z170A SLI PLUS
- Processor : INTEL CORE I3-6100 (3.7 GHZ)
- Memory : G.SKILL AEGIS 4 GO (1 X 4 GO) DDR4 2133 MHZ CL15
-GPU :
6x => Sapphire PULSE Radeon RX 580 8GD5
1x => ASUS ROG STRIX AMD Radeon RX 580 TOP edition 8Go
-PSU : Corsair HX1000i 80PLUS Platinum
- Risers :
* 1x M.2 to PCIe : https://www.amazon.fr/Bonjouree-Adaptateur-Convertisseur-dalimentati-Tournevis/dp/B072VBZ2LP/ref=sr_1_1?ie=UTF8&qid=1502905302&sr=8-1&keywords=m2+pci
* 4x PCI-E 1X tp 16X risers : https://www.amazon.fr/Espresso-3-0-PCI-E-Adaptateur-dalimentation-extraction/dp/B01LWKSOH0/ref=sr_1_1?ie=UTF8&qid=1502905341&sr=8-1&keywords=pci+riser
* 3x PCI-E X16 RISER CABLE : http://www.ldlc-pro.be/fiche/PB00218427.html

I assembled the rig and powered on but I can't get the 7 GPU to work.
I tried :
1) with 7 GPU
- Install windows 10,
- Install the GPU drivers (I tried 3 times but this always causes a blue screen if the 7 cards are plugged in but it works well with only 1 Graphic card )
=>this doesn't work

2) with 7 GPU
- Install windows 10,
- Do not install the drivers
- Install claymore (can't get it working, it always crash)
=>this doesn't work

3) with 1 GPU (ASUS ROG STRIX AMD Radeon RX 580 TOP edition 8Go)
- Install windows 10,
- Install the drivers
- Install claymore
=> This works well

4) with 4 GPU
- I bought Ethos : https://gpushack.com/collections/gpushack/products/ethos-16gb-digital-download
- Installed on a USB key (8Gb)
- Start it
- It works with 4 GPU's (I tried every combination of 4 GPU and it always work => there isn't any hardware problem)
- It stops working with more than for gpu (tried with 5, 6 and 7. they are always detected on boot) => error : kernel panic, I tried this without success : http://ethosdistro.com/kb/#many-gpus


I have another small PSU of 500W to power 2 GPUs => 5 by the main PSU and 2 by the secondary one.
It's not yet installed => everything is using the same PSU for now


But I'm sure that my this is not the problem.


Please, help :(

PS: I also post this question here on bitcointalk.org but it seems that this forum is more active : https://bitcointalk.org/index.php?topic=2095021

Comments

  • EtherminerJayEtherminerJay Member Posts: 157
    Are you sure your mobo can handle more than 4 cards?

    I had the same issue where anymore than 4 cards and they weren't detected. So I sent my motherboard back and got a new one.

    Check out the latest pro BTC motherboards that are out. Or have a look at other motherboards that can handle that amount of gpus

    Hope this helps!
  • greatauror28greatauror28 Member Posts: 125 ✭✭
    I don't think "7x GPUs" and "1000w" PSU should be in one sentence. That's the problem. Buy another one - or at least have 20% headroom total wattage for zero issues.
  • rudolfrudolf Member Posts: 5
    Same issue here, I run Ethos 1.2.9 (updated) with 4 RX580 stable. Adding a 5th RX580, all cards are detected during boot. After Ethos starts mining one card stops (stuck_minder 0Mh/s) and the others mine but unstable. Try all combination of cards, risers, cables, power and PCIe slots. Looks like an Ethos problem...

    Motherboard: GA-MA770T-UD3P (4x PCIe1x, 1x PCIe16x)
    GPU: 5x SAPPHIRE PULSE Radeon™ RX 580 8GD5
    Dual PSU Corsair 650W
    http://1c82ab.ethosdistro.com

    Any serious suggestions, hints, links....?
  • mehranblnmehranbln Member Posts: 3
    rudolf said:

    Same issue here, I run Ethos 1.2.9 (updated) with 4 RX580 stable. Adding a 5th RX580, all cards are detected during boot. After Ethos starts mining one card stops (stuck_minder 0Mh/s) and the others mine but unstable. Try all combination of cards, risers, cables, power and PCIe slots. Looks like an Ethos problem...

    Motherboard: GA-MA770T-UD3P (4x PCIe1x, 1x PCIe16x)
    GPU: 5x SAPPHIRE PULSE Radeon™ RX 580 8GD5
    Dual PSU Corsair 650W
    http://1c82ab.ethosdistro.com

    Any serious suggestions, hints, links....?

    There should be an option named "Above 4G decoding" in the MB BIOS. That must be enabled for the MB to assign proper IRQs. My MB has a H270 chipset and without 4G enabled, the exact same thing happens.
  • theonektheonek Member Posts: 83
    i think you just can't use all of the pci-e on this particulat mobo simultaneousely because of chipset limit i guess. And the other thing is, in amd mobos there is no option above 4g decoding, they do that on default. With more recent chipset for am3+ i am talking, like 990fx, there is no problem to run 6 cards, and it is tested!
  • maxshah912maxshah912 Member Posts: 15
    Try to turn on 4G decoding on on bios and you will be fine. Also get AMD latest driver and use commute mode on AMD settings app.
  • asusrigasusrig Member Posts: 72

    I don't think "7x GPUs" and "1000w" PSU should be in one sentence. That's the problem. Buy another one - or at least have 20% headroom total wattage for zero issues.

    I agree. Those cards are pushing around 140-150 watts with tweaks. Without tweaks they could be using more.

    150 watts x 7 = 1050 watts.

    You are already maxing it out before even considering the CPU and Motherboard etc.

    Even adding a 500 watt is still pushing it.

    My wife's computer would crash with Claymore when I was using a subpar PSU to power even one 1070 lol! It worked fine initially and after a few weeks just gave up and would shut down the computer the moment the GPU demanded some processing power. Once I replaced it with a gold rated EVGA PSU all was fine.

    You have a great PSU but it is too small for your application.

    I am powering six RX580 cards with five case fans via EVGA 1000 watt and EVGA 750 watt gold rated power supplies connected together via a Dual PSU Power Supply 24-Pin 20+4 ATX Motherboard Adapter w Way Cable. It works great.
  • cjclm7cjclm7 Member Posts: 51
    edited February 12
    Correct. I think no one will be able to run 7 RX580 with a 1000w GPU (even if you are a master on undervolting RX580)...

    My suggestion: connect only 4 RX580 on that 1000w (if it is still alive) and buy a new 850w and connect the other 3 RX580 on it. Carefull separate also the riser power cables (4 on 1000 and 3 on 850).

    Not to forget you running 24/7 and you would like it to last until you reach the break even point of your investment (at least that).

  • maxshah912maxshah912 Member Posts: 15
    Connnect 2 GPu underwart over clock it connect other 3 do same you will be able to run 5 GPU on that power supply after underwalting them at moment I am running 9 GPU on 1600 ( 2x 800 ) psu pullling about 1350 from wall
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