Seemed to happen after I had the PCI-E connectors and splitters fry, and I replaced the power supply and installed new splitter(s).
The 3060Ti LHR was getting over 60 MH/s, the 3060 LHR was getting close to 50. Now they have dropped to pre-LHR hack levels. I have tried various miners (nbminer, gminer, t-rex, lolminer) same or similar rates.
I have also replaced the boot USB with a rebuilt one, and updated the NVIDIA Driver.