Is your environment 10C higher than OP's? Most reviews compare coolers in terms of the temperature increase over background temperature to control for this.
80C for a 9900k under sustained high load would not concern or surprise me. It's a high end power hungry CPU. 100C is the cutoff temperature so maybe more cooling might help it turbo more but I doubt you even get throttling at 80C.
80C for a 9900k under sustained high load would not concern or surprise me. It's a high end power hungry CPU. 100C is the cutoff temperature so maybe more cooling might help it turbo more but I doubt you even get throttling at 80C.