Ok, so user selects too-high speed, controller tries for ages and fails, but doesn't save since it's overridden by user in BIOS? I distinctly recall thinking m

Ok, so user selects too-high speed, controller tries for ages and fails, but doesn't save since it's overridden by user in BIOS? I distinctly recall thinking my LPDDR5 NUCs were broken since they seemingly didn't boot the first time, until I recalled the training stuff. Took up to 15 minute on one of them. But neither has had any issues since, hence my question.