Every RAM is different; it must adhere to the motherboard's supported specifications. This includes the RAM type (e.g. A. DDR3, DDR4, the maximum capacity in rummy time apkeach slot, and the motherboard's overall capacity. For instance, DDR3 modules cannot be installed on a motherboard that supports DDR4 RAM because the physical notches on the modules are different to avoid improper installation. RAM speed is another important compatibility factor, in addition to type and capacity.