If your computer is running slow, freezing or crashing, it could mean that you need a memory upgrade. Operating systems, software and multimedia files keep getting bigger and hungrier, which can bog down even some of the newest computers. If a virus scan shows that your computer is clean and you’re still having performance problems, it’s time to get some more RAM.

Desktop Memory Upgrades
Desktop computer memory is available in two varieties: SDRAM and DDR RAM. Although SDRAM was the standard a few years ago, it’s now the slowest type of PC memory available. DDR SDRAM is faster than SDRAM, making it a popular choice for memory upgrades.

PC RAM plugs into a DIMM slot inside your desktop and connects using 168-pin, 184-pin or 240-pin slots. You’ll need to know which type of connector you have, as this will limit your choices. The goal is to get as much RAM as possible into the available slots.

Each memory chip is known as a module, and the way the modules work together can affect performance. In the case of SDRAM, the memory will only perform at the speed of the slowest module. DDR SDRAM varies; some modules can be mixed, while others must be paired. This table shows the memory upgrades available for each type of DIMM slot:

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