I've a PC with Windows 10, CPU: AMD FX-3870 8-Core 4GHz, air-cooled by Arctic Freezer A11 (non-stock), and GPU: Sapphire Radeon R9 380 ... I'm trying to figure what exactly is considered damaging temperatures for my PC (using Open Hardware Monitor app for sensors logging).

The CPU idles at ~23c and GPU idles at ~50c -- so no problem there.

Under heavy load (games) temps average at ~62c for the CPU and ~80c for the GPU -- within the safe range as far as I know.

However, CPU temperature can briefly spike up to 78c, logged about ~50 spikes per hour under load. So, are those spikes normal? are they dangerous? If so, What can I do about it?

Thanx, in advance :)