I do not want to go into the derail with the exact names of the parts. My pc is old. Have DDR3 maximum 4GB RAM, 1GB graphics card and an old cpu with two cores. I really overclocked everything on it because it's so slow and I can't work normally. And I don't leave many processes open at the same time. But before that I could at least play minecraft on the lowest settings. But since I overclocked it, that doesn't even work anymore. How does that work? So you can still work on it
Please don't go into so much detail…
Probably your CPU is getting too hot and is throttling the clock.
Your CPU is probably getting too hot and throttling the clock rate and thus the speed.
So it would be faster, so to speak, if I set it back to normal clock rate?
Yes, it should be better that way.