To upgrade your laptop's RAM, you need to install the right kind of RAM. That can get complicated, as laptop RAM is physically different to desktop PC RAM. Even seasoned upgraders have ...

If your laptop can only run RAM modules at 1600Mhz, installing an 1866MHz module will still work but will only run at 1600MHz ...

there are speed gains to be had by installing matching memory sticks in pairs. Assuming your laptop supports dual channel memory. How much RAM do I need? How much RAM do we really need?