Bitcoin Forum

Dear community,

I‘m troubling to mine successfully Ethereum / Ethereum classic on a 4 GPU rigs consisting of:

1x Intel® Pentium® G4520,
1x Mushkin DIMM 4 GB DDR4-2133
1x GIGABYTE GA-Z170-Gaming K3-EU
4x Palit GeForce GTX 1060 DUAL
2x Kolink ZURC-007 Riser PCIe
1x Enermax Revolution X't II 750W
1x Intenso TOP SSD 128 GB

Running on Ubuntu 16.04 x64 with proprietary Nvidia driver 375.66.

Unfortunatley one GPU connected over a riser is freezing all the time, sometimes after 3 h, 7 h, 20 h or even 5 min. I‘ve no idea what is happening. I swapped one GPU from a riser to the to the problematic slot (Riser energy, USB cable, Riser, PCIe bus, GPU energy) and the “replaced” GPU is freezing as well. I try to run 3 cards by using this slot and it hangs again. By using 3 cards without this “broken slot” it seems to work.

First I thought that I’ve an issue with the power supply but since a PSU calculator confirms that 750 Watt should be enough ( http://www.coolermaster.com/power-supply-calculator/ ) end Enermax guarantees 744 Watt over 12 V (even 850 Watt for seconds) I’m continuing my search. I measured 510 Watt at wall…

Under-clocking doesn’t helped so I’m running the cards on their default settings (except constantly 100 % fan speed). Temperatures are about 62-72° C all the time.

However I tried to use different programs for mining (ethminer, claymore) and I’m still troubling with freezes. Claymore send “WATCHDOG: GPU 2 hangs in OpenCL call, exit” and ethminer just hangs up. Nvidia-smi doesn’t start up till a reboot.

Now I try to replace the “working” slot with the unstable components (~32 variations) in order to identify the problematic part. Due to the random freezes this could take 10 days or several weeks ( I’ve a job :-/ ).

May someone of you can help me? I appreciate any helpful suggestion!

Thanks!

mabye this gpus are not stable for mining,try to replace your cards with new one from the seller this is the only solution for this problem
or try another os like windows 8,7,10,dont waste your time and send your cards to its manufacturer instead hope this helps.

Mining with three cards and avoiding one slot (pcie bus, riser, riser energy, gpu energy) seems to be stable. But I'll try to use Windows 8/10. May the nvidia driver is crap (it is, but the question how much).

Well there is something wrong with the slot then you know this because you used 3 different working gpus. Does that slot work on its own with just one gpu which is itself ? If so then that is very strange. I don't think that is the problem though. I think the problem is the slots broken as you say. Try another motherboard of you can. I think you going to need to buy another motherboard though.

Got similiar problem in past, i checked everything, power source, motherboard, ram, cpu everything.
Turns out, my GPU was bad physically, i mean i sent it back to producer and he fixed it.
Same thing it was, random freezes 5 min / 3 h / 5 h etc.

like i said before you know

I’m still not getting why the GPUs are part of this problem since some of them are freezing depending on the slot. Additionally I got freezes now on the “working” slot and the “broken” one was running fine.

Yesterday I switched to Windows 8 and there all GPUs are crashing after 10 min simultaneous…
I looked up in the Mainboard BIOS and changed the PCI-Bus to v2, since that they are all running 16 h without crashes (on Windows!!!!).

Meanwhile someone suggest me exactly this idea in my reddit post:
“I had a very similar issue. Go into your bios and look for your PCIe settings. Change it from v3 to v2 or v1. I had all kinds of problems until I changed this. Not one freeze/crash since.”

I’ll keep inform you about the problem/solution ;)