I purchased an Acer aspire 3 A315-53G-5968 which has one non removable ram of 4gb and an additional slot. I want to know the ram can be increased upto what limit? If I put in a 16gb ram, will it work in harmony with the 4 GB non removable one since I've heard it's better to have two ram sticks with the same memory. Also could you tell me the clock speeds of the additional ram that I should buy? Is it 2400 MHz? Any other things I need to look into before I purchase it? Will there be any performance issues or will the performance be upto the mark?