PC memory, also called RAM or Random Access Memory, is a type of computer storage that works at very high speeds to store and process data. When you open a program or access a file, the operating system of your PC locates the information in long-term storage (like a hard disk), then loads it into the faster and much more responsive RAM. As a result, opening programs, running applications, and accessing files happens nearly instantly.

The more RAM you have, the faster your PC will perform. However, just like any other component, there are a number of things to keep in mind when shopping for RAM. For example, you’ll want to consider capacity, speed, and XMP. Capacity is simply how much RAM your motherboard supports, while speed is measured in megatransfers per second and often referred to as bandwidth. You’ll also find that RAM is marketed with a set of timings, such as CAS latency and row precharge time, which tell you how many memory clock cycles it will take for the CPU to complete an operation in RAM.

Lastly, you’ll want to look for a kit that includes two sticks of RAM at the same frequency. This ensures that the modules work together on matching channels to maximize performance. You’ll find kits with dual-channel RAM, which will enable you to take advantage of your motherboard’s double-channel design, and high-end RAM that supports triple- or quad-channel designs, which are typically reserved for workstations and servers.