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I'm running 4 Vega 56 with stock BIOS and was able to get 1950 h/s on 3 of them, but my 4th is only running at 1720 h/s. I am using block chain drivers, tried disabling and re-enabling everything and all of the cards are over clocked to the exact same settings. Anyone know of any reason why this might be happening?
What brands? I have a PowerColor (1850 H/s) and it does 100 H/s less than my GigaByte and Sapphire (1950 H/s) on the same settings.
I was using 1 MSI, 2 Gigabyte and 1 Sapphire and I just added another MSI for a total of 5 GPU. Again, 4 of them are running at 1950 H/s and 1 at 1730 H/s. I am going to have to double check exactly which GPU it is, but I would love to see 1950 all the way down the list. It might not be worth the head ache messing around with it for such a small gain.
I have an RX 580 that generates 10% lower hashrate despite all GPU-Z readings being the same. Just a shit set of silicone.
Yeah I was thinking that might be the issue, just a slower card for some reason or another.
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I too am experiencing the issue of when the miner runs for 4-6 hours, I will randomly get 0 H/s on 1 of the GPU and shortly after the miner will just stop.
I've run into the same problems with one of my rigs (8 Vega 64s) .. turned out that one of my GPUs was on the fringe for being weak. Had to dial back from 1100mhz to 1000mhz and up the HBM voltage to 950 and it's run for days without issue. Sometimes with it up at 1100mhz it would run for 2 hours or 36 hours without issue and then would crash the system. No rhyme or reason. To diagnose the problematic GPU I split test with multiple instances of the miner (in my case xmr-amd). 4 devices on instance 1, 4 devices on instance 2. One of the instances will lock up. Then split test those devices (6 devices on instance 1, 2 on 2), eventually it became apparent which was at fault as the miner would lock up with the other running. Couple times it would lock up at like 10 PM and run all night full steam not mining a damn thing just burning electricity... split testing eliminated that issue
Great idea! Thank you for the advice, I will try and make some adjustments that you recommended here and hopefully I can diagnose and fix the problematic GPU then report back. - Yeah, I would set the miner up before bed only for it to stop an hour after falling asleep and then it runs for another 7+ hours doing nothing.
