I have been doing some stress testing on my Ser5 Max and it crashes running CineBench R23. What I have observed is when a single core is idle and boosts that it will sometimes crash. The easy way to test is to run CineBench R23 single core run. I would let it create 3 titles and then hit stop and then wait a second and hit start again. I would repeat this process multiple times until it crashed. What I mean by a crash is sometimes it would power off and others it would reboot. I would also jump back and forth between the multi core and single core test, stopping it before it finished and start another run. I noticed that for the multiple core CineBench run if the cores were already busy and the cores did not have to boost up that it would run. I told chatGPT what was going on and I made a bunch of changes to the BIOS until it became stable. After it became stable I was able to go back and figure out which settings are really needed. I would go into the bios and reload the defaults before you make these changes. Also, there is a little hole in the front of the Mini PC that will let you clear the BIOS in case it won’t boot. With the Power on, I would push in a pin into the hole for a seconds or two and the machine would reboot.
Hopefully these settings help someone.
Beelink SER5 Max (Ryzen 7 6800U) — Minimal BIOS Settings for Stable Single/Multi-Core Performance
Bios path: Advanced → AMD CBS → SMU Common Options
Notes:
- PPT Control, Fast/Slow PPT Limits, STAPM, SmartShift, Fan, Voltages, Zstates → leave on Auto.
- This setup fixes rebooting on single-core boost while keeping multi-core and single-core scores high.
- Safe for daily use; temps remain 75–78 °C under sustained load.
