How to choose RAM

Start from your CPU platform and socket — that locks you into DDR4 or DDR5 before you even look at speed or brand.

1. Platform determines generation

The most important decision is already made when you choose a CPU and motherboard. AM5 (Ryzen 7000/9000) and Intel LGA 1851 (Core Ultra 200) require DDR5. AM4 (Ryzen 5000 and earlier) and Intel LGA 1700 (12th–13th Gen) use DDR4. There is no compatibility between the two — the notch positions and operating voltages are different. Confirm your motherboard's supported memory list (QVL) before ordering.

2. Capacity: how much do you actually need?

For general gaming and everyday tasks, 16 GB (2×8 GB) remains viable but feels tight with modern games and a browser open. 32 GB (2×16 GB) is the comfortable current default — it handles gaming, streaming, editing light video, and background apps without paging. 64 GB targets content creators, developers, and VM users. More than 64 GB is workstation territory.

3. Speed and latency

Higher MT/s is not always better if timings loosen proportionally. For DDR5 on AM5, 6000 MT/s CL30 is a well-documented sweet spot because it keeps the Ryzen Infinity Fabric in a 1:1 ratio with the memory controller. For Intel platforms, the sensitivity is lower and you can push higher clocks with XMP without as much concern about a fabric ratio. For DDR4, 3600 MT/s CL18 is a similar sweet spot on AM4.

4. Form factor

Desktop systems use DIMM (unbuffered, 288-pin for DDR4/DDR5). Laptops use SO-DIMM (260-pin for DDR4, 262-pin for DDR5). Some modern thin laptops and mini-PCs solder LPDDR5X directly to the board — check before you buy if upgradeability matters to you.

5. Always buy two sticks

Dual-channel mode nearly doubles memory bandwidth compared to a single stick in one slot. Nearly every modern platform benefits — APUs and integrated graphics depend on it significantly. If you buy a 32 GB kit, get 2×16 GB, not 1×32 GB. Check your motherboard manual for which slots to populate first (often A2 and B2, not the slots closest to the CPU).

Bottom line

Platform → capacity → speed with reasonable latency → dual-channel. If you stick to 2×16 GB DDR5-6000 CL30 on AM5 or a 6400 XMP kit on Intel LGA 1851, you are covering the vast majority of gaming and productivity use cases without overspending.