DAW0021,
On behalf of Tom's Moderator Team, welcome aboard!
Although "Throttle" temperature for the i7-8700K is 100°C, here's the nominal operating range for Core temperature:
Core temperatures above 85°C are not recommended.
Core temperatures below 80°C are ideal.
Core temperatures increase and decrease with ambient (room) temperature. The international "standard" for
normal room temperature is 22°C or 72°F.
Q: What is your ambient temperature?
Q: What is your Core voltage during the stress test?
Q: How many Watts is your power consumption during the stress test?
The "Stress CPU" test under
CPU-Z's "Bench" tab is only about
80% TDP workload.
We tested a
delidded 8700K OC'd to 5.0GHz at 1.344 Vcore with a 240mm AIO at 22°C ambient temperature.
Running CPU-Z v1.89.0, Bench, Stress CPU; Power consumption was 118 Watts, average Core temperature was 62°C, idle 25°C.
Running P95 v29.8 Small FFT's with AVX disabled; Power consumption was 156 Watts, average Core temperature was 71°C, idle 25°C.
If you'd like to get up to speed on this topic, you might want to read this: Intel Temperature Guide -
https://forums.tomshardware.com/threads/intel-temperature-guide.1488337/
You might find Sections 9 through 12 of particular interest.
Once again, welcome aboard!
CT 😎