1. Yes it is normal. The system is shaking hands with the hardware - memory training shows the same double bump. This will happen each time you do a full power down.
2. Where are you connecting your keyboard to the motherboard? I would have thought that using the designated USB connectors for keyboard and mouse would just pick it up. There is a setting in the bios I seem to recall for enabling legacy USB devices. That keyboard is USB2 so unless there is something I am not aware of it should work just fine.
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