alot of people bring up the thermal paste but the majority of cases it's the heat sink that's the problem. Make sure you check the heat sink for dust build up. Because i had replaced my thermal paste and issue wasn;t resolved till i vacuumed it all out. Mine went from sounding like a plane taking off, to a sleeping baby.
I cleaned all the dust and changed the thermal paste. Dust was the biggest issue but might as well change the paste whilst you've got it disassembled.
PS4(PS5 Soon)and PC gaming
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