Question Computer slows down drastically after 1-2 hours

[Marek Chuman]

Usually my computer runs well the 1-2 hours I run,but after that some programs take like 1-2 mins to open.This has never occured to me before and I want it resolved.There isnt a problem with the WiFi since other devices run well on it. My friend said that there could be something wrong with the cooling,but when I checked it the computer wasnt even hot to touch.

 

[rgd1101]

full system spec? include make and model of the psu
what the cpu/gpu temp after 1-2 hours?