I am currently running 3x 3090FEs with upgraded pads (all purchased retail) using nbminer (latest per flight sheet config). Recently I upgraded HiveOS versions and installed 2 of the 3 cards as new cards I just acquired. I am running some overclocks on them, but nothing that I would consider anywhere close to unstable. Current OC settings are:
Card 0: 66% Fan, 1200 Core, 2800 Mem, 285w - 125.5mh 46/84c
Card 1: 66% Fan, 1500 Core, 2800 Mem, 300w - 125.4mh 50/86c
Card 2: 66% Fan, 1150 Core, 2800 Mem, 300w - 125.4mh 48/86c
In fact, this rig can run for 12+ hours with no issues and all temps stay at 84/86c. But then overnight it just stops mining in the middle of the night without rhyme or reason. All I see the the following when I look at the terminal. The rig is still running, the cards just stop mining. If I reboot, the rig and all three cards pic up like nothing happened. Looking for any insight someone else may have.