Buying RAM is simple once you know which type your computer uses. The three generations, DDR3, DDR4 and DDR5, are not compatible with each other, so the right choice is the one your system supports.
The three generations
- DDR3 is found in older systems. Browse DDR3 desktop RAM.
- DDR4 is the most common generation in PCs from the last several years. Browse DDR4 desktop RAM.
- DDR5 is the newest generation, used on newer motherboards.
Each generation uses a different notch position on the module, so a module will not fit in a slot meant for another type.
Desktop or laptop?
Desktop memory (DIMM) is a full-size module. Laptops and many mini PCs use smaller SO-DIMM modules. They are not interchangeable either, so check which form factor your device uses. See our laptop RAM in stock or all computer RAM.
How to find out what your PC uses
- Look up your motherboard or laptop model on the manufacturer's website and read the memory specifications.
- Or open your system, read the label on an existing module, or use a free system information tool in Windows.
Capacity and speed
Your motherboard and processor set a maximum supported memory capacity and speed. Faster memory will usually still work in a slower system, but it runs at the speed the system supports. For most everyday use, capacity matters more than speed: 8GB is a practical minimum today and 16GB suits most users and gamers.
Use matching pairs
Most desktops run best with two identical modules installed together, which enables dual-channel mode and improves memory performance. A 16GB kit of two 8GB modules is usually better than one 16GB module paired with an older mismatched one.
Need help choosing?
WhatsApp your motherboard or laptop model to 071 137 2518, or send it through our contact page, and we will confirm the right memory before you order. Thinking of a bigger upgrade? Read how to check CPU and motherboard compatibility.
