ok.
It is better start with afterburner for newbies. aplly 1st 75 power limit dont touch clocks yet.
then add in bat file in phoenix this : -straps 1 -nvmem 1
After this run bat file then on afterburner increase memory clock slowly slowly until it crashes write down all speeds and hashrate then repeat same for straps 2 and 3 find best for you. Also you can increase -vmr manually later. good luck