6GB ram but only 3,24 usable

[MIIFOO]

I had 4gb (2 gb each) ram and decided to replace one with a 4gb. After that it showed me that I had installed 6gb ram but only 3,24 gb ram usable.
(I have 64 bit win 7).

 

[RealBeast]

In your system control panel, double check under system that it says system type: 64 bit operating system. That is a suspicious amount.

 

[MIIFOO]

Just checked by start>right click computer>properties where it said 64-bit windows

Motherboard:H55MXV series foxconn

 

[Novuake]

What motherboard do you have?

Which EXACT version of 64 bit windows do you have?
Home Basic? Professional?

 

[MIIFOO]

Motherboard:H55MXV series foxconn

os: win7 64 bit home premium

 

[Novuake]

Hmmm interesting. Reset your BIOS and see if that helps.