Has anyone with this motherboard figured out how to keep an XMP profile enabled without experiencing the mouse/keyboard lag? I would like to get the most out of my RAM...but this keyboard/mouse lag after sleep is really annoying. If I disable my XMP profile it doesn't do that. Windows sleep seems to be fine.
Try disabling XMP if you are setting XHCI Mode to Auto.
If Smart Auto or enabled you can use XMP.
I think when iMac13,x smbio.plist is available, it will fix the problem as the new iMac will be available with 1600MHz memory modules.
Test this solution and inform me please.