So I have just had a very quick play, no extra tweaking.
Gigabyte Aorus Master X570
3900X (crappy silver sample, t'was an early one)
Default cinebench score: 6877 @ 142 watts, all 3901/3901/3901/3901mhz
Clocktuner score: 7550 @ 154 watts, 4325/4325/4250/4250mhz
Previous Cinebench score with PBO etc; 7208
So Cinebench is giving me a 9.7% increase over default and 4.7% increase over PBO results with all limits off
For games
Gears of War 5 default - CPU (game) - 290.7fps, CPU (render) 220.3fps
Gears of War 5 Clocktuner - CPU (game) - 292.2fps, CPU (render) 225.0fps
Ashes default - CPU average all batches 128.9fps
Ashes Clocktuner - CPU average all batches 128.4fps
So a definite significant improvement in cinebench, small couple of percent improvement in gears and tiny regression in Ashes
I did notice that it's running a good 5-8c cooler though which is better than a kick in the teeth.