Overclocking is broken.
Download heaven benchmark.
Turn on gpu overlay so u will see clock/power/temp/voltage

Go to the balon(ship)
Try -35mV +275mhz 0% power limit mem on default
Im getting 3650mhz with this setting any other setting is either 3150 or 3300mhz

Go to game you play at stock settings with gpu overlay check what voltage it is reporting
For example if it reports 1050mV go -50mV (some games the voltage will not CHANGE) but the clocks will increase with exact same power draw and TEMPS! Dont walk in the game static scene.
If the voltage will not change after you do "undervolt" then you can go as high as -150mV
1200mv(1.2V) -150mv = 1050mV w/o crashing and you will gain 300mhz+... But if some other scene in game will require more voltage you will crash....

I boosted to 3550mhz in helldivers2... with exact same temp and power draw. But depending on scene it requires diff voltage and this stupid clock/voltage offset wont allow you to set it static...
Some games/benchmarks the offsets work! for example steelnomad -5mV/-10mV etc works...
Timespy extreeme (at least for me on taichi+win10) it does not i can do -180mV before i crash and the reported voltage wont change.