4840 MHz 1.5V stable (but I wrote, I had no time, so about 20 minutes), Noctua NHD14, ambients about 20C (i dont like "hot" in room , max 22C ), temps about 65 C Coretemp (so about 75C real?).
90C under Antec Kuhler 920 is not possible...Namegt tested some chips 8150 under AIR in PRIME and had about 70-77C (I think, he used Frio)