In my opinion, AIDA is not a good program for testing & determining system stability.
I would suggest ROG RealBench, it provides more realistic benchmark and stability testing.
Although 80c under stress is well within thermal limits of Haswell, I would expect better at only 1.219v.
But then much depends on your ambient temperature and the capabilities of your CPU cooler.
Intel i9 10850K@ 5.3GHz
ASUS ROG Strix Z490-E
Corsair H115i Pro XT
G.Skill TridentZ@ 3600MHz CL14 2x16GB
EVGA RTX 3090 Ti FWT3 Ultra
OS: WD Black SN850 1TB NVMe M.2
Storage: WD Blue SN550 2TB NVMe M.2
EVGA SuperNova 1200 P2
ASUS ROG Strix Helios GX601