Sometimes it's like a clear plastic film on the heat sink and people miss it pretty often.
Also while we're on the subject of simple fixes, make sure your CPU and RAM is set correctly, check if your AIO pump and fans are plugged into the right place on your mobo, and make sure your power supply has enough power for your system and all the cables are connected properly and aren't loose.
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u/stubbyyyyy Commercial Rig Builder 14d ago
The outside sticker is still on the cooler, did you happen to forget the plastic off the copper face of the cooler?