Help with massive FPS issue

[M0U5EY1]

Hi guys, I have looked through countless forums and discussions and still found no answer to my question. When playing GTA (normally high+) and bf1 (ultra/high) the frames are fine for the first 20 ish mins and then they absolutely tank, massive frame drops anywhere down to 5 (normally 70-100) and its almost unplayable. I have no idea what it is or how to fix it so any help would be appreciated. Having experimented with bf1, even turning it down to low when the stuttering started and it was no better if not worse, here are the performance graphs for when I was running it on low for a bit;
http://imgur.com/a/F8t85
My specs are 4690k at 4.4Ghz 8gb hyper x fury 1070 ftw
Max temps on CPU are around 75-80 degrees.

 

[M0U5EY1]

I have never seen that particular value at 100%, only the one in the processes tab syncing with frame drops, the ones using the most by far though were system for some reason and then the game (gta V) at the time.

 

[Multipack]

Are you sure it wasn't performing a Windows Update or virus scan or something? The system process shouldn't be used for a game.

 

[M0U5EY1]

Pretty sure to both, running the latest build and I highly doubt it was running a scan. I also doubt those at why would it be doing those everytime i happen to play?

 

[Multipack]

It wouldn't I am just surprised your disk is the bottleneck and am wondering why it is using 100%. You need to monitor your system to see what maxes out and why during the game.

 

[M0U5EY1]

Ok, I will do next time to see if I missed anything, that will have to be next Saturday however as I am away from my PC this week, is there any other better way you can think of for monitoring the usage other than just watching task manager?

 

[Multipack]

Yeah if you go into Task Manager, under the Performance tab there's a link to open Resource Monitor. From that you can check usage history and more detailed stats.

 

[M0U5EY1]

Ok! Problem sorted, after about 2 hours of troubleshooting and guessing what the issue was shadow plays 5 min replay feature writing and reading massive temp files to the HDD, this then was slowing it down and it is now fixed! Thanks for all your help!