system only using 16 of 32 gb of ram

bellc09

Honorable
Jun 14, 2013
6
0
10,510
So I just recently bought the new Asus z87 tuff series mobo and 32gb of corsair vengencs ddr3 memory 4x8gb.

I went through the bios and updated the memory speed to 1866 but I can't find where to set the system to use all 32gb of ram.

The mobo supports 32gb
And I'm running windows 7, 64 bit.

Under the control panel/system menu it says I have 32gb ram installed but only 16gb is usable.
 
What version of Windows 7 64 bit?

Here's the maximum memory supported by each version:

Windows 7 Ultimate : 192 GB
Windows 7 Enterprise: 192 GB
Windows 7 Professional: 192 GB
Windows 7 Home Premium: 16 GB
Windows 7 Home Basic: 8 GB