I have a P8Z77-M Pro Asus motherboard and I install 4 x 8G of Ram memory. On my

I built this computer myself for some serious gaming. I already had 16Gs install and it was showing up, when I click Start, right clicked Computer and then properties. Now I install two more 8G Ram memory sticks, all four the same company and now when I click and went to my computer properties it says, 32G(16 usable). I called the manufacturer of the motherboard and that was a waste of time..what are customer service for??? Anyway I told them the same thing and they said, "That's about right and they are working I just don't see them". Is that correct or was that just a person that was tired and didn't feel like a long conversation with me. I am trying to learn. I am a computer tech and I am now finding out that in some computer don't take certain amounts of memory, even from the same Ram stick, like DDR2 and DDR3. I planned to game until my last breath and each time another computer game comes out, they need more and more Ram memory, so I am just being safe. Since I upgrade my processor, hard drive and Ram memory, my computer is lightning fast. Maybe I am just nitpicking, do they say that anymore, but it would be sweet if I could see 32G Ram memory and all working. If 16G is the only thing usable, it the other 16G needed??? I would appreciate someone's input.