How do I find what memory stick I need for my computer?

Random Access Memory (RAM) is a key factor in how quickly your computer can load software and juggle multiple programs. Installing more RAM is an affordable and relatively easy way to upgrade your computer's performance. Although the physical installation is simple, finding the right memory stick can be a far greater challenge. Motherboards are particular about what types of RAM they'll use, and if you don't get the right type and speed, you risk damaging your computer.

Your Manual

If you still have it, consult your computer's manual to find out what type and RAM speed your motherboard accepts. Even if you've lost your manual, you can sometimes find copies online. If your computer is custom built, look for the motherboard's manual, as it's the motherboard that interfaces with RAM. You can find out what motherboard you're using by clicking on "Start" and then "Run" and then typing in "dxdiag" and pressing "Enter." This will bring up The DirectX Dialogue, which will tell you a lot about your computer, including what motherboard it uses. This information will be listed beside "Model."

CPUID

CPUID is a graphically driven system analyzer that can be freely downloaded. If you don't have a manual, then you can get the necessary information by running CPUID. Both perform the function easily and fast. If you choose CPUID, download and install it, then open the program. Click on the "Mainboard" and then "Physical Memory." On the bottom half of the screen you'll find information about what type of RAM your computer is currently using. Note the entry next to "Type." This is what type and RAM speed you need to upgrade your computer.

System Information for Windows

System Information for Windows is a lighter version of system analysis software that presents most of the essential information without bogging the user down in unnecessary details. It has both a freeware and a Pro version, though the freeware version will suffice for finding out what type of RAM you need. Download and install it, and then run the program. Click on "Hardware" and then on "Memory." In the window on the right you'll be presented with information about your RAM. Note the "Memory Type" and "Speed" of your RAM, such as DDR2-533. This is the type of RAM you need to upgrade your system.

Source:

CPUID: Download

SIW: Download