Nanominer 3.3.10-cuda11 high ETH hash rate problem on 3060 Ti (+100MH/s) and too many rejected shares
Hello,

I am mining ETH on Nanominer 3.3.10-cuda11 on Windows.  Rig with 8 GPUs, 1x Nvidia 3060, 3x AMD RX5700 XT, 4x Nvidia 3060 Ti. Power source Corsair HX1200 + HX850 parallel, MB Asus Z490 Prime, RAM Patriot DDR4 2660 Mhz 8GB, Gigabyte SSD 120GB. 

Rig was mining very well for 5 months on ETH (Nanominer) algo  (restart once a week) from 03/2021 till last Saturday 11.09.2021. That Saturday Rig freezed and from that time Iam not able to mine properly on Nvidia 3060Ti GPUs. AMD cards are mining OK. I have no log from that time, as I reinstalled Win completely. 

Nvidia 3060 Ti GPUs are reporting hashrate from 53 to 120MH/s per card and randomly cycling. As a result, avarage reported hashrate is more than 60Mhs, but GPUs has from 10 to 100% of rejected shares, with slight overclock (PL 63, Core-502, Mem +800, fan 80%, GPU temp cca 50°C ) and also without overclock. AMD GPUs are OK, no problem and the same on N3060 without Ti. All GPUs are OC with MSI afterburner v 4.6.3. 

What did not worked:
- complete PSU change, cable change, Riser change
- DDR4 change
- MB change
- Win reinstall, Nanominer update
- it means, nearly everything except CPU and SSD was replaced
- SSD surface deep test OK

I have more Rigs, so I took the 3060Tis which have high rejected share rate to other Rig and Gpus are working OK in other Rigs, so they are not damaged. Additionally, I took other 3060Ti with another Rig to this problematic Rig and it creates the same problem. 

I can send nanominer log, where this is visible, it is very strange and I am not able to remove the problem, as I replaced nearly everything and it did not help.

Any idea guys? Thank you very much. Martin




