Why do my CPU temps spike after a couple hours of gaming?

Posted by East_Construction785@reddit | buildapc | View on Reddit | 5 comments

Hi, this is my first time in this subreddit, but a little bit of background, I built a pc a couple of months ago. I have a r7 7800x3d with an arctic freezer 36, and when playing games like siege my temps range from about 65-75. However after about 2 hrs I notice my temps are at 80-85 and don’t drop down in between rounds when there is obviously less load on the cpu. I also noticed that when temps were at 85, the heatsink wasn’t very warm. Could my cpu cooler be mounted badly? Anyone have any other ideas?