will DDR3L 12800 will be compatible with existed DDR3L 8400?
I want to upgrade my laptop with an extra 4 GB RAM. I have ACER-V3-574G model laptop with 4GB DDR3L 8400 RAM with clock speed 1600 MHz (part number: ACR16D3LS1KNG/4G). If I add DDR3L 12800 with clock speed 1600 MHz, will it be compatible with the previous existed RAM? Please help.