-Non certified GC may be a reason but this cannot be a only reason. Because, I have a non certified GC now but this GC was certified before but I still get active Real View icon.
-Second reason is I have two active monitors for a same system unit (SU) before I gave incorrect connection to my SU and monitors as result I got a grey Real View icon.
Usually because you dont have a recognised graphics card. Check if yours is on the approved list.
Steve