/I can see my all of RAM installed but it has 4GB hardware reserved, can I release it?

Jendoe

Hello,

I have an Acer Aspire V3-772G -54208G50Makk, Model NO. VA73.
i5-4200M2.5GHZ, NViDIA GeForce GT750M
One HDD with an additional second slot and a SATA adapter. 
It came with 8GB DDR3 of Kingston RAM (2x4) 1.35V, 1600MHZ Unbuffered, Non-ECC. It has 4 slots. 
I installed a 8GB HyperX DDR3 1.35V, Unbuffered, Non-ECC.
It read it in the Task Manager monitor as 16GB but I have 11,9GB usable and the other 4GB are hardware reserved.
If I put additional 8GB it adds up to 16 GB and reserves another 4GB off of the fourth slot. 
What is the reason and can I release it? Or does my laptop supports only 16GB of RAM 4x4 in which case I will never be able to use the third slot in full effect.

If you need additional info I'd be happy to oblige. 

Thank you in advance.

brummyfan2

Hi,
Have you tried swapping the modules around? If not, give it a try, you can also try different combinations and see the results.