Let's redo all these tests during winter, ok ?
I'm quite sure at that time the exact opposite results will come up: 95% of the CPUs do reach the advertised boosts, while 5% do not.
it is the new reality of today's self-overclocking processors (GPU, CPU), temperature is a thing.
Here where I live, when it's raining and chilly at night that I need to actually put a sweater on... my R7-3700X goes to 4.4 Ghz a lot. With PBO I've even seen it at 4.525 !
But during the last week's heatwave, it wasn't even touching 4.25 ....
That 15 degrees difference in my room temp (15 night vs 30 day) was enough to add or subtract 200Mhz of my CPU's clocks.
Steve from GamersNexus was one of the first to put a video about this.
(He was talking about all-core overclock level, however the automatic boost ALSO depends totally on temperature!)
---
AMD's mistake was omitting this aspect in their presentations
This is what it should say on the slide:
Ryzen 9 3900X - Max boost 4600Mhz
at 20 degrees ambient with fan curve on "Turbo" (or aftermarket cooler capable of 150W TDP)
---
Unfortunately derb8er completely neglected this aspect in his poll.
With added question: What is your ambient temp during testing?
- under 15 °C (I live in Siberia)
- 19 °C (AC on - I like it cold)
- 23 °C (Nice and pleasant)
- 28 °C (I'm poor and no AC)
- 35+ °C (Please kill me!)
I'm 99% convinced everyone with lower boosts have higher ambient, or they simply like a warm room where they use their PC, while those that did boost at advertised or higher live in colder climates.
And the reason most CPU's in the poll did not boost at advertised, is because probably most results come from Europe or USA, where right now it's a hot summer with plenty of heatwaves.