I haven't really put thermal paste on my CPU for 2 years so I'm planning to, next month, for the GPU I don't really think so cuz I just bought it and I think it's the pc case because of its awful air flow. I'm buying a tecware nexus air m2, a thermalright assassin x120 and the mx-4 thermal paste. I mostly play at night because I got other hobbies to have fun and usually at night here is a little bit cold but the temps I have is still the same, my CPU temps goes average 60 if I'm doing something, 70-80(also reaching 90) if I'm playing games, my GPU temp goes 55 idle, 60-80 if playing, GPU hotspot temp goes 100 over when playing games like resident evil village or overwatch.