Im starting understand Ryzen overclocking a bit more now
All core boost generates a lot more heat. 4.5Ghz on all cores 100% automatically uses 1.325 V and hits 82c on good air cooling.
Taking it much higher manually, e.g. 4.75Ghz on all cores 100% automatically uses 1.375 V and hits 89c on air cooling.
4.8Ghz all core and auto voltage crashed shortly after it hit 90c
There must be an auto thermal shutdown at 90-95c which is being hit. It could be overridded because the actual thermal limit is 115c I think for the 5800X
Manual voltage im sure I tested last week and needed 1.4V to hit 4.9Ghz all cores, but cant be certain if I can multi or single R20 test. Probably the single core test as it would have been too higher temperature.
PBO seems great for single core auto overclocking as a single core will hit 1.5V at 100% usage, but then keep switching core to core so only for a short period of time
Ideally I would like 4.75Ghz on all cores, whilst using PBO to boost single core at a time to 5Ghz. This is not possible as all core multiplier overrides PBO
This of course is overclocking and useful only for trial and error / testing.
Gaming wise, nothing uses 100% of all 16 threads yet anyway.
That said, it's good fun to seeing the 8 core 5800X beating 10900K 10 core chips that are overclocked to 5.2Ghz
I'm an Intel fanboy so it's interesting seeing the multi and single core scores getting beaten with less cores, cost, heat and more power