3.2gb Out Of 4.0gb 16.04

I hope I'm putting this on the right website. I'm not completely use to terminal commands, so sorry if I put the wrong ones.

I upgraded from 2gb to 4gb DDR2 RAM. In bios, it shows up with the full 4096 (4gb), but in Ubuntu 16.04 it only sees 3.2gb.

Output of free -m:

free -m
              total        used        free      shared  buff/cache   available
Mem:           3249         908        1259         164        1081        1996
Swap:          3315           0        3315

In the lshw command under the memory part, it shows:

 *-memory
          description: System memory
          physical id: 0
          size: 3249MiB

Thanks for the help. :)