After upgrading (forced by Microsoft) to Windows 10 version 1803, only the voltage underclock settings for the 1st GPU in a multi-GPU system is saved as per the AB GUI. Tested and confirmed on multiple mining rigs with 8x AMD GPUs. The setting appears to be saved, but switching back and forth between two GPUs it shows as reset to 0 again. Downgrading Afterburner has no effect. Clean reinstall of drivers has no effect. Changing value by only 1 has no effect. Setting value for all similar cards has no effect.