"only" way to fix it, is by de-lidding the cpu.
For example.
My delidded 4670k 4.7ghz@1.4v maxes 77-80c IBT very high
non-delidded 4690K i got 98-100c in a matter of seconds in IBT. (really like 2-3 seconds) with same clocks & volts. (only for benchmark purposes).
24/7 is 4.6ghz@1.33v & cooler is phanteks ph-tc14pe with 2x stock fans, stock config.