I recently built my first pc but found out the other day that it is only using half of the memory (using 2gb out of 4) in the system specs of pc it says thaat it recognises the 4gb but bin rackets it has (1.99 gb usable). Whats wrong? should i buy another 4gb so i can use 4 or can this be fixed? Thankyou for any answers
P.S I am using 64 bit windows 7 ultimate
Make sure the bios reads all the ram like the previous poster said.
The aforementioned MSCONFIG boot setting is also a possibility.
The core I3/I5/I7 have a surprisingly common bent cpu pin issue that often limits ram, if that is your CPU. You would have to remove the cpu and carefully check for bent pins. But that would be a last option because its a lot of work to pull the heatsink/cpu.
Be sure to reseat the ram. It may be something that simple.
Also check for bad ram chip or chips.