2 Graphic cards in my LAPTOP! (HELP PLS)

Apr 3, 2018
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So my laptop has 2 graphic cards an amd 8610g and an amd r7 m260, From my understanding the 8610g is used for lower end applications, while the r7 m260 is used for heavier applications, but i notice while ingame that the r7 m260 only has only 800 mbs of ram, while the 8610g has 3456mbs of shared memory.
how do i reduce the 8610g's shared memory and increase the m260's memory, and also is it the right thing to do? (i play alot of games so i need the best performance)