Before you do anything based off of info I give you, here's a little disclaimer. This is information I know primarily from desktop GPUs. I am fairly certain that this will work for you, but I can't be sure as I can't test it myself. If something goes wrong, I'll try my best to help you out, but it's your choice to do this or not. Flashing can brick your graphics card, and it can be very difficult to get it functional again.
Alright, lets start with clockspeed. You should be able to raise your clockspeed by increasing the TDP base clock and the Boost Clock. For simplicity's sake you can make these the same like this:
When you press save it will change the greyed out value to the same speed as well.
Set it to what you want, I would set it 135mhz higher than whatever clockspeed you can get now with the slider all the way (by the looks of it, 135MHz higher than 719?). That way you can be sure it will work and that you haven't gone too far.
You'll also want to change the boost table so the value in green is the clockspeed you want the card to run at, like this: