I have Windows 8 64bit PC with 16 GB memory installed. All the memory is properly recognized on my Asus motherboard and also by Windows as shown in the picture below.
I like to have many browser tabs open while watching videos in the background etc. so I expected someday to max my memory.
But I have never observed a memory usage over 8GB. What is going on? Is Windows not configured to take advantage of all that memory, or is it some sort of memory management?