Not sure this is quite correct, ive got a hybrid which boosts to 1340mhz and no matter whether I put +100 or +150 and any amount of extra voltage it still bounces around 1450mhz.
This is all whilst the core doesnt get anywhere near 60c.
I thought it might be the VRM's making hit a thermal limit but even increasing the stock fan (on the GPU itself) it still doesnt make any difference.
Id be interested to hear what others are finding?
You can see in gpu-z the reason
Power limit is obvious move the slider in AB or flash your card if it's locked at 109% or whatever.
Thrm is obvious your cards to close or past the target temp (around 80c and boost scales back)
Vrel = cards got no more volts to give up the core voltage.
I dunno about others but msi is bios locked to a safe limit but you can still up it using afterburner to that limit (only gave me 30mhz more boost though but might give a higher oc manually)
Vop = no idea not enough psu?
Util just means the card isn't getting enough load from the game/benchmark