Base on Intel Ark, the Tj.max is 102 degree When I using AIDA64 5.97 FPU Stress test after 5 minute , cpu clock start became unstable, it drop to base clock then go back to 4G. But the highest core temp is just 90 degrees, there is still a distance from 102 degree So I wonder to know is there a different tj.max for AVX512?
What you saw is likely the difference between temperatures at different points on the chip. Core temps don't align exactly with FIVR (voltage regulator) temps, but all are monitored by the throttling watchdog.