Same issue on most of my 3060ti EVGA SC2. Only a few are unlocking even after 30 min run time.  Tried changing the LHR tune to 32 but no difference.  Just keeps stepping down until LHR 10, never unlocks.  On the cards that do unlock it's great. On bench testing rig with 1 or 2 cards no problem.  Having issues on 6 card and 12 card rigs.

Bra, unfortunately dot has inflation rate of more than 13% and a shady history. Another pump and dump scheme from a former developer of a respected project. https://messari.io/asset/polkadot/metrics

Was mining BTX on bitcorepool for while using SMOS, cc miner tpruvot 2.1, could never get a good OC and stability like I get with dstm miner on equihash. It is tempting though now that difficulty has halved in past week. HiveOS has SP-Mod cc miner fork! 

Was having problems with 13x 1070ti rig on SMOS.  Troubleshooting all day.  Replaced risers, lowered overclock.  Read this post and thought I'd try swapping a G4400 for an i5 7500.  No Difference.  Tried adding 8GB of RAM instead of 4.  No difference made.  Still would error or cpu would lock 180 s reboot if I added more than 10 gpus on.  Tried HiveOS.... up and hashing all 13 cards in under 30 min.  Unbelievable, and I'm back to my original setup minus the SMOS:  HiveOS, Pentium G4400, 4 GB Gskill RAM, Asrock h110 pro, 13x EVGA 1070ti black,  OC 200 core, 700 mem.