Sometimes you gotta retry it a few times. But Memory Try It! has helped me a good number of times to make the BIOS retrain.That true that why am trying to run gear 1.
Just figured the issue i think. Updated to latest bios but did not help.
If i boot XMP GEAR 2 Then reboot and switch to gear 1 it sometime boot after a long preboot dark screen.
Play with memory try it without success for some reason. Probably need to increase voltage with it to boot.
But sound like it the memory learning thing. It learn Gear 2 with the timing then switching to gear 1 is easier.
Gonna report back soon gonna test that again!