Question Why is my Available Physical Memory only half of my Installed Physical Memory?

[Jongster1]

How can I fix this pls?

Installed Physical Memory (RAM) 48.0 GB
Total Physical Memory 24.0 GB
Available Physical Memory 18.2 GB
Total Virtual Memory 36.5 GB
Available Virtual Memory 28.3 GB

MSI B450
RYZEN 2700X
CORSAIR VENGEANCE PRO 32gb Dual 3200 and 16gb Dual 3200
GTX 1060

 

[helpstar]

Are you using windows 10?

Is the BIOS of the motherboard up to date ?

In which slots are the sticks installed?
should be 2x16 in Dimm slot A2 and B2
and 2x8 in Dimm slot A1 and B1