Components

Memory (RAM)

Memory has to match your motherboard's DDR generation before speed or capacity matter. These guides compare RAM kits by capacity, speed and platform.

43 buying guides and 7 explainers.

What to check first

How Much RAM Do You Need?
Capacity comes first, then channel configuration and speed; choose for the heaviest real workload plus reasonable headroom.
RAM Speed and Timings Explained
Effective memory performance combines transfer rate, timings, memory controller behavior, and application sensitivity.
DDR4 vs DDR5: Which Should You Choose?
Choose based on the whole platform cost and upgrade path; memory generations are physically incompatible and performance gains vary by workload.
How to Check ECC Memory Compatibility
ECC support requires alignment among CPU memory controller, motherboard firmware and traces, memory type, and operating mode.
Two RAM Sticks vs Four: Which Is Better?
Two modules usually make high-speed stability and future upgrades easier; four can be useful for capacity or aesthetics but loads the memory.
XMP vs EXPO: What They Do and How to Use Them
XMP and EXPO are stored memory profiles that simplify tuning, but enabling them is still an overclock and stability should be checked.
How to Check RAM Compatibility With Your Motherboard and CPU
Use the CPU page, the board's memory table and the QVL to confirm RAM before you order.