Weird sound inside of the pc when playing an intensive game.

https://reddit.com/link/1tb42or/video/15v9jo7syp0h1/player

I’ve had my PC for around 4–5 years, and until recently I never noticed any unusual noises from it.

Lately I’ve been playing Valheim on medium settings at 120 Hz, and it makes my PC work pretty hard. While playing, I started hearing a strange sound from inside the case. The best way I can describe it is like a “writing data” sound, almost like an old hard drive clicking/working, but I’m not sure what exactly is causing it.

I recorded a video showing the inside of the case while the game is running so the sound can be heard.

I7-4790
GTX 1060 6gb
Case: Thermaltake Chaser A31 Snow Edition (One Fan at the bottom)

Note: The game is installed on a HDD but the is ran from the SSD