i have 2 slot of ram motherboard msi a75 e35 i have one ram kingstone hyperX blu 1600mhz 4gb
i dont know how to configure ram because windows experience index score 5.9 on memory and also have bad performance on games especialy DOTA 2
You need two sticks of memory. I saw this exact question a couple months back. The A10 relies so much on memory bandwidth that having 2 sticks of fast ram (1866 Mhz+) is needed for gaming.
Having two sticks means you can run it in dual channel mode which doubles the memory bandwidth. Since the RAM functions also as the VRam as well as the RAM, it's very important to have it running fast, otherwise the GPU will be severely bottlenecked.