Frames dropping while playing games

[AuNe22]

After playing video games (mostly csgo) for about 10-15 min i start to experience some fps drops. This all just started about 1 month ago.
Then i open task manager on my second monitor. And whenever the fps drops starts i can see a drop in cpu usage and also a spike in hard drive usage.
Does anyone know something that can help me?

 

[LORDPrometheus]

I would look at ram utilization it is possible you are running out ram for the program which will dump active memory to the hard drive massively slowing down any game