AWE using 24GB of RAM SQL Server 2012
I would recommend you to read this article:
https://blogs.msdn.microsoft.com/psssql/2009/09/11/fun-with-locked-pages-awe-task-manager-and-the-working-set/

It covers all possible questions about AWE and answers to them
Also you might find the post from Paul Randal helpful:
A SQL Server DBA myth a day: (5/30) AWE must be enabled on 64-bit servers