Adding RAM is one of the fastest and easiest DIY upgrades one can make. It’s so easy in fact that virtually anyone can do it.
First, make sure you buy the correct kind of memory sticks. Most newer computers use either DDR4 or DDR3 RAM modules.
If your system is old enough to use either DDR2 or even plain DDR RAM it probably wouldn’t make sense to pay for the upgrade.
A quick way to find out which type of RAM your PC uses is to type the model number of the computer along with the word “RAM” into Google and visit a couple of sites until you find the information. You can also usually find the RAM type listed on the side of the box the computer came in should you still have it lying around somewhere.
Important: You will also need to know the maximum amount of memory your computer supports. On my Gateway desktop that happens to be 8GB. Your computer might support more or less. Just be aware that you can only add RAM until the total amount installed equals the maximum supported amount.
Second, make sure you install your new memory modules in matching pairs. While it is often possible to add a single new RAM module in most computers, adding two or four at a time could make the system run faster and experience fewer random errors. Always purchase RAM with the same specs as the memory sticks that are already installed, especially the speed rating. Mixing RAM modules with different memory specs often causes problems with system stability.