Have you tried mounting it again encase it’s slightly misaligned and repasted it? Do you have sufficient case airflow?
any that you can recommend that would fit the case https://www.thermaltakeusa.com/view-71-tempered-glass-edition.htmlFor a 9900k I’d want more than 2 intake and 1 exhaust fan, it look into more fans. I doubt the fans are the main problem but also it’s probably not helping.
The best HSF is useless without good case airflow - 2 x 120MM front and 1 x 120MM rear (blowing in the same direction, with the fans on the HSF blowing the same direction ...For a 9900k I’d want more than 2 intake and 1 exhaust fan, it look into more fans. I doubt the fans are the main problem but also it’s probably not helping.