Standard High Performance Plan doesn't fully unpark cores. Frequency scaling is disabled but most cores could still be parked. To fully disable this you have to edit the registry which is not the smartest thing you can do to your PC, laptop especially. I use ParkControl from Bitsum to easily adjust that when I need it, it's free and makes a big diffrence on my laptop in few games. I don't know if Process Lasso with ProBalance and Gaming Mode enabled and with high priority on game process will add much but it seems that it's also free now.