16gb RAM but only 7.9 usable

Bisher90

Reputable
Jun 17, 2014
1
0
4,510
it might be an incompatibility between the the RAM bus speed or most likely an incompatibility between the one of the RAM's and the Motherboard.

you can also exchange the RAM's in another slots to make sure that there is no any physical damage in any of the slots.
 

Rokuldav

Honorable
Mar 28, 2014
200
0
10,680


I forgot to mention that the reason I bought more RAM is that when I had 8gb on the new mobo it cut it in half leaving only 3.9gb.