Windows 10: Why is 8.1 GB reserved for hardware?

Recently I added 8 GB of ram to my machine so that it would run Photoshop more smoothly. But when I installed the memory and ran the program I realized that 8.1 GB of 16 GB is reserved for hardware making only 5 GB available to Photoshop which is not enough. So I wanted to know if there was a way to reduce the reserve and make more memory available to my system.


Machine specs.

Ryzen 1600

16 GB Crucial memory

2 TB hard drive

gtx 1050 ti

:)

 

5.9 GB of 8 GB is listed as hardware reserved!?

My RAM is mem tested and all good. Running Windows 10. 5.9GB is listed as unusable, hardware reserved!!! How do I get it back? Should I want to? My system runs great; no errors. Still, I assume that 5.9 out of 8 GB is excessive.

note: the common "fix" to clear max mem box in msconfig does not work! Tried it. My bios has no memory configuration settings. Where did my RAM go? Anyone, please, have a solution that does work?

 

8 GB RAM installed, yet 4.1 GB is reserved for hardware.

I am also having this issue. I ran the SFC tool and found problems on the first pass, but it said it fixed all of them. I ran it twice more and each time after said it didn't find any integrity violations.

I am running a Cyberpower PC and have attached my Task Manager screen shot. 8 GB RAM installed, yet 4.1 GB is reserved for hardware. Do you have any suggestions?

motherboard: ASUS M5A97 LE R2.0

cpu: AMD FX 6300

gpu: Geforce GTX 560

win10 64bit

 

Hardware Reserved 4GB (DIMM Slot 1B)

So recently my task manager started showing that only 12GB of my 16GB DDR3 RAM in Dual Channel was available stating "Hardware Reserved 4.0 GB"

These are the steps I've currently taken to attempt to rectify the issue.

1. Flashed BIOS
   
2. Wiped OS and installed to a new drive
   
3. Set max page file size to recommended (2.5GB)
   
4. Maximum memory isn't enabled in advanced boot options
   
5. Replaced the odd stick of RAM (I had a Kingston HyperX Fury) with the same model (now all Corsair Vengeance) so now all sticks match
   
6. Resetting CMOS fixed it for a few hours before returning.
   

I want to avoid the idea that the DIMM slot is faulty due to a CMOS reset fixing it (even if temporarily).

The RAM I'm using is: CMZ12GX3M3A1600C9 (3) and CMZ4GX3M1A1600C9 (1) Both the same model of RAM, but the 3 came in a kit for 12GB whilst the other came as a single kit of 4GB, hence the slight difference in the part numbers.

The motherboard I'm using is 990FXA-UD3 R5.

I'm asking as a seperate question due to the fact I've tried every other suggestion in the other questions and now feel that my situation is unique enough for it's own question.