Hi all,
 
	My BigBox is silky smooth at 1080p, however, at 4K the preview videos run in slow motion, i.e. they look as though they are playing at 15fps.
 
	I don't have any issues playing 4K games or videos using both VLC or Windows Media Player (i7 and 1080ti).
 
	As soon as I switch back to 1080p everything runs smoothly again.
 
	Please can anyone advise on what might be the issue?
 
	Thanks
 
	Comet988