Hi All. I am a newbie and have been mining for about 3 weeks. I'm using Claymore v9.3 on Windows 10 64 Bit. My issue is that if I put any sort of stress on the machine at all, It crashes. And it is consistently "GPU 3 hangs in opencl" that causes the crash. What I mean by stress is if I try to dual mine anything, increase the difficulty setting, or overclock the GPU's.
I have 6 XFX RX 480 8gb Black Edition cards. I have modded the BIOS on all 6 cards copying the 1750 timing strap to the 2000. I am using the Crimson 16.12.2 video drivers. The most stable setup I have is when the difficulty is set to 8 on cards 0,1,2,4,5 and 7 on card 3. Using MSI Afterburner I set the voltage to 0, the core clock to 1,100 and the memory clock at 2,000. The fans on all 6 cards is set to 85%.
With all the above settings I am getting aproximately 27.7 mh/s from each card and a total of 166 mh/s. It takes approximately 14 hours to mine .1 ether using ethermine.
I would really like to dual mine and/or get my cards up to 30 mh/s but like I said, anything I try causes GPU3 to hang and restarts the machine.
As for the rig, It is open air with a HP 1200 watt power supply for the six cards and a Thermaltake 850 watt power supply for the mother board and PCI Risers. Riser 1 and 2 are powered by daisy chain 6 pin cable, as are risers 3 and 4. (2 cables, 2 plugs each). Risers 5 and 6 are powered by 6 pin to SATA adapters connected to a SATA daisy chain cable.
Any theories why I can't push this setup any further?
Thank you for reading.
Brian
Did you set virtual memory in Windows to a minimum of 16GB? It is a must for using more than one GPU on a system. Mine is set to 24GB. Does it also crash in dual mining if you lower the memory clock? If the bios is modded sometimes pushing them too hard causes havoc. Try mining at 1880 memory clock setting with dual mining and slowly go up from there and find where it is stable.