Not detecting all ram?

aaronebridge

Prominent
Jan 11, 2018
2
0
510
Specs:
AMD FX-8350
ASUSTeK COMPUTER INC. M5A97 R2.0 (Socket 942)
Windows 10 Pro 64-bit

I've got two 4GB G.Skill Ripjaws, and two 8GB G.Skill Snipers. All are DDR3 and 2133Ghz.

My computer is only using 16GB of ram. I know all of them are working properly, so what's the deal? Any advice?