Won't support games

[HunterBrad]

Specs:
Msi h170 gaming m3 motherboard
I3-6100 3.70ghz Intel could
16gb g.skill ripjaws ram
2tb HD / 360gb ssd
Geforce 960 2gb OC gpu
Windows 10 pro
750w psu

Updates:
Everything updated, including bios, and programs

Q&A:
Settings on games?
I have everything to lowest detail...

What is running in background?
Read below please.

Did you try disk cleaner / defrag?
Yes, nothing has changed.

Age of products?
Everything is new, few hours old.

Problem:
When I play games such as ( blacklight, trove, last chaos, and devilian ) I am able to play for a short amount of time and I always get crash errors, sometimes it says I don't have enough ram.

When I checked my pc to see the specs, it says I only have 2.26gb usable of ram, out of 16gb.

I don't have any programs that I don't need running off, only just the ones my pc actually needs....

What can I do, or download to cleanup ram space... or even be able to plan my games without crashing?

 

[muddyparrot]

you installed the ram in matched slots? i.e used a slot missed a slot? i know its obvious but i have to ask just to rule it out

 

[bignastyid]

Did you check msconfig and make sure maximum memory is not checked?

 

[HunterBrad]

I will check the msconfig, but yes, it is in dim1/dim3 slot

 

[HunterBrad]

Update:
All 4 cores are running, and maximum memory is not checked. I did some research, and something stumped me....

When I installed windows 10, I selected x64 version, cause it's said that x32 can only use 4gb...

So... would I have to switch to x64 version so I can have more free ram usage?