I am not a tech person, but I cleaned out my secondhand PC today, and it took hours with the sheer amount of dust accumulation. The fans were nearly overloaded with it!!
Does a clean PC run better / faster than one filled with dust? Or is it more a matter of keeping the fans running easily? Or something else…? Idk, maybe I imagined it, but it seemed to boot much faster after cleaning. Could be wishful thinking!
It’s meant to be right behind/in the big rectangular hole. It should have some screw holes on the side where it connects to the outlet (likely also has a power switch) that match up with the ones in the case. It looks like there’s an optical drive in the way though. If you like I can try my best to circle them for you.
I’d love (hate) to see the computer with the side panel open.
Fan too big. ):
Tbf, I did not build this. A friend did and then sold it to me for a good price! Can’t complain. It’s run pretty good for 6+ years. Though I guess I have no point of comparison.
If it works don’t fix it. Only issue might be extra dust but it sounds like there’s no solving that issue in your computer.