PC Processors

[BWSComputers]

Hi

Im currently testing a Ryzen 9 5900x in Cinebench and with OCCT, and keep crashing my system.
When i run single-core benchmarks everything's good, but as soon as i run multi-core benchmarks, either the program crashes or the machine just straight up restarts.
i have check the temps with HWmonitor and they are just a bit below 90*C, so i dont think overheating is the problem.

Anybody got any ideas? Or experienced the same thing?

Specs:
CPU: Ryzen 9 5900x
GPU: Nvidia RTX 3080
RAM: 16GB DDR4 3600Mhz

[misterj]

BWSComputers, first post all your parts. Look in the Event Viewer and post several of the Critical errors, Basic tab. Also post a screenshot of Ryzen Master running Cinebench R24. Please only RM images. Thanks and enjoy, John.