RTX 50-series cards were running a scheduling trick that helps on 40-series and hurts on Blackwell. It's now off there: the RTX 5080 went from 60.6 to 77.9 sol/s, ahead of lolMiner's 74.2 sol/s. Nothing changes on other cards.
Thanks to Randel for the report and the testing. More benchmarks welcome: run mxbm --report and paste it into an issue or DM me the file.
https://github.com/Maxnflaxl/MXBM/releases/tag/v0.8.452
Discussion: https://forum.0xmx.net/d/207-mxbm-v08452-rtx-50-series-fix
Telegram: https://t.me/mxbm_miner