Most cheap laptops these days ship with only one stick of RAM, and thus are only operating in single-channel mode. By adding another memory module, you can oper

Most cheap laptops these days ship with only one stick of RAM, and thus are only operating in single-channel mode. By adding another memory module, you can operate in dual-channel mode which can increase performance a lot. You can see the difference in performance by running a full memory test in single-channel mode vs multi-channel mode with a program like memtest86 or memtest86+ or others.