EVGA has reportedly outed a firmware update for GeForce RTX 3080 Ti LHR models that addresses the "power lock" issue on these cards while mining. With the new firmware installed, miners found that their 3080 Ti LHR cards delivered up to 91 MH/s in Ethereum workloads.
https://www.notebookcheck.net/New-EVGA-firmware-boosts-Ethereum-mining-on-GeForce-RTX-3080-Ti-LHR-units-by-over-20-percent-up-to-91-MH-s.584967.0.html