installed ram is 8gb but i can only use 3.25 gb

sambennett

Honorable
Jan 28, 2014
16
0
10,510
i have 6gb of ram installed on my spare pc but it says only 3.25gb is useable. also i do have an 64 bit operation system. pc specifications are:
processor: Intel(R) Pentium(R) D CPU 3.40GHz
installed memory: 8.00 GB (3.24 Gb useable)
System type: 64-bit Operating System

can anyone help me out please. the computer is only for a very small minecraft server.