Windows 10: Half Ram is in Hardware reserved

I've tried Multiple different solutions and non of them seem to solve the issue. Everywhere in windows it says I have 16GB of memory installed but only 7.94 Usable the rest in hardware reserve.this happens with another working kit of ram. it only happens when 2 sticks are installed single channel works fineI've moved them all around to every slot and the issue remains the sameI've largely been able to ignore this issue but now my computer is getting constant blue screens due to memory management errors and I'm experiencing freezes and strange behavior in games.CPU: Ryzen 5 2600Motherboard:

:)

 

Half RAM allocated to "Hardware Reserve"

 

Half RAM allocated to "Hardware Reserve"


Hello everyone. I really hope you can help me. I'm at the end of my rope.

First off, my specs:
Gigabyte 990FXA-UD3 mobo
AMD FX 8350 CPU
2 x G skill 4 GB sticks
EVGA 660 Ti GPU
OS on SSD
2 x 1 TB mechanical drives

Only half my RAM is showing as usable. The rest is shoved into hardware reserved. It doesn't matter what channels I use or even what RAM I use, it cuts whatever is in there by HALF. I even tried 4 sticks, cuts 16GB into 8GB.

I've tried CLEAN installs of Windows 10 AND 8.1, still cuts in half.

I've send mobo back to gigabyte, they tested and found no problem.

I tried a different CPU, still cut in half.

I tried different GPU, still RAM halved.

I've tried editing registry, unchecking that box for "maximum memory" in the msconfig boot menu. I've looked all through the BIOS and tweeked different settings. Nothing.

I'm hoping someone can help. I don't know what else to do here.

Included are screenshots.

 

Half RAM allocated to "Hardware Reserve"


I have almost same configuration and this is what it looks like here:



May be important that I'm using BIOS, not UEFI.