Recently bought a used XFX RX 570 and temps were touching 80C@80% fan speed. Decided to change thermal paste because previous thermal paste was dry. After changing the thermal paste the temps dropped to 73C@70% fan speed. But after using it 4 days, the temps are back to high i,e 80C@80% fan speed. I did take apart cooler after freshly applying thermal paste because I forgot to attach backplate. What could be the reason? Is it becasue of taking it apart after freshly applying thermal paste?