Update! So I am back to 4 working cards! Made an odd discovery last night. If I run them with the 17.30 driver they tend to be unstable and have serious issues. If I run them with the 17.11.2 driver they work just fine, mind you they are an average of 70 h/s slower on the 17.11.2 driver. I had read somewhere that you can toggle the driver for mining in the global settings but I can't seem to find the option in AMD settings. Tonight I will try to add the 5th card. Also, I am mining using Claymore's AMD GPU miner for Cryptonight. Is there a better miner out there that supports 6 cards?
Thank you,
Been following your progression -or there lack of. I feel your pain. Been running into the same challenges with 6 x Vega 64s and the Asrock Fatality X370 K4 mob. At one point I had 5 gpus running on the AMD blockchain driver at over 2000H/S at around 1250w. When I would try to install the final gpu I would get bsod (blue screen of death) - restart - bsod - restart - advanced options screen where I could then start in safe mode. couldn't get five gpus running after that.
I have done many clean windows installs (15 plus) to no avail. I'm finally running stable on 6 gpus on driver 17.11.2, but my hash rate now sucks at about 1400h/s per card. That's overclocked and undervolted. I want the hashrate of the blockchain drivers, but don't know how to get the 6 cards working with it.
At a loss and following your updates.