cpu and gpu way hotter than usual for seemingly no reason?

my pc has been working completely fine since 2021, but recently i noticed that my temperatures are like 10-20c higher than they're supposed to be. I've reapplied thermal paste, installed another fan and even got a new cooler and literally nothing has changed.

i could just be on a game with only 40% cpu load and it'll be at 80c and i have no idea why. Sometimes it even outright overheats and turns my pc off which is how I figured this out. idle at 10% load the cpu is around 53c and gpu is like 54.9c

my cpu is an 11th gen i5-11400 intel core something, and my graphics card is a nvidia geforce rtx 3070ti

ngl i dont even know if its a hardware or software issue