Could you provide some more informations like:
What´s the maximum Tdie temperature while using Prime95 with "small FFT"?
Did you set the vcore while using ASrock Settings or AMD CBS?
Hint: Take a screenshot of HWInfo while running prime95 for about 10 minutes.
Try 3200 fast instead of 3466 safe. When my mind doesn't lie, 3200 with fast timings are better than 3466 and slow timings.
My 2700x goes to 4.2GHz with 1.33v and stays just below 80°C while running prime95.