FPS Drops (GPU usage falling from %99 to %0-30)

[Mozarela]

Specs:
Windows 10
M4N68T-M v2
x4 965 3,4 GHz.
GTX 650
4 GB RAM
250 GB HDD

While i play game my GPU usage falling from %99 to %0-30. No difference between 800x600 and 1920x1080 resolutions. RAM usage normal, CPU usage ~85 (sometimes falls ~20 but i think it's wrong cuz no difference in game) I'm playing Dark Souls 3 and i know this specs not good for this game. But i saw youtube videos, with same specs can be played stable 30 fps. What should i do?

edit: GPU temp: 50-52~ C
CPU temps: 59-60 C

videos
https://youtu.be/XZE47zWx3Ok
https://youtu.be/PjVWQdhz0QA

 

[Mozarela]

Also I just realized your hard drive is only 250GB? How much free space do you have?

I have 12 GB Free on C:/ . I did 2 different GPU stress tests for an hour and GPU usage never gone down to %0. Always %99-100.

 

[Rogue Leader]

12 gb free is very low, it can cause performance issues, is there any chance you can clear up some room?

 

[Mozarela]

12 gb free is very low, it can cause performance issues, is there any chance you can clear up some room?

I have 35 GB free now. I did fresh install, tried 5-6 old drivers. Still same. My gpu usage still dropping to %0 even on 800x600 resolution.

 

[Onus]

Since it ran better for a while when you disabled Afterburner, look for other things running you can remove. For it to get worse again after you died, there could be a memory "leak" in the program. Adding RAM may help. Use Task Manager (Win10) or msconfig (prior versions) to remove unnecessary startup crap like Acrobat and Office stubs, messenger programs (e.g. Skype), or other non-essential programs.

 

[Mozarela]

Since it ran better for a while when you disabled Afterburner, look for other things running you can remove. For it to get worse again after you died, there could be a memory "leak" in the program. Adding RAM may help. Use Task Manager (Win10) or msconfig (prior versions) to remove unnecessary startup crap like Acrobat and Office stubs, messenger programs (e.g. Skype), or other non-essential programs.

I did. I tried some "booster programs" and custom virtual memory. Still same. Sometimes i can play 1-2 minutes without fps drop, sometimes every few sec Fps dropping.

(I did not add ram, still 4gb, i tried lower the usage)