freeing up memory put in two different channels


Apr 14, 2016
I have an Acer Aspire 772 G that mounts a VA70_HW mainboard, a I5 4200M CPU and it has four memory slots. The CPU can handle 32GB. In mounting memory in bay 1 and 2 (two different channels) windows frees up half of the total memory. if I put the same quantity in one channel, say bay 1 and 3 windows frees up the total quantity.
I have spoken with so many people about this. I've received so many different answers from.. some funny such as .. i5 has only two cores.. to bad it wasn't reminded that in the 1 core ages one had many memory bays at ones disposal. the most simplistic answer was "you just can't do that!" grotesque.. "your computer only has two memory bays". Internet says it can be addresses in the advanced setting area of windows... ... such fairy stories.
There has to be a real reason underneath things as machines that use the same motherboard are sold today with 32GBytes of memory... to bad ACER'S technical staff is left clueless