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DDR5 kits, speed tiers & value

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DDR4 vs DDR5: what to buy in 2026

In 2026, DDR5 is the default for new builds. DDR4 still makes sense on AM4 and older Intel systems where you already own the platform.

Platform lock-in is the real decision

You do not choose DDR4 or DDR5 independently — your motherboard socket decides. AM5 and Intel LGA 1851 (Core Ultra 200S) are DDR5-only. AM4 and LGA 1700 (12th–13th Gen) are DDR4. If you are buying a new CPU and motherboard in 2026, you are almost certainly buying DDR5. If you are upgrading a Ryzen 5000 or 12th/13th Gen system, stay on DDR4.

DDR5 advantages

DDR5 offers higher peak bandwidth (starting from 4800 MT/s JEDEC vs 3200 MT/s for DDR4), larger die sizes per module (single-rank 48 GB sticks exist), on-die ECC within each module, and lower voltage at lower speeds. XMP 3.0 and EXPO profiles on DDR5 support faster rated speeds up to 8400 MT/s and beyond. For workloads that saturate memory bandwidth — video encoding, 3D rendering, large data sets — DDR5 is a clear upgrade over DDR4.

When DDR4 is still fine

If you have an AM4 or LGA 1700 system with a fast DDR4-3600 or DDR4-4000 kit already installed, upgrading to DDR5 means also replacing the CPU and motherboard — a full platform change. For gaming workloads, the real-world difference between optimized DDR4-3600 on Ryzen 5000 and DDR5-6000 on Ryzen 7000 is present but not dramatic in most titles. The bigger gains come from the CPU generational jump, not the RAM generation alone.

DDR5 latency concerns — still relevant?

Early DDR5 had notably worse absolute latency than mature DDR4, because base CAS latencies were higher (CL40 JEDEC) versus DDR4's CL22 at 3200. In 2026, well-tuned DDR5-6000 CL30 kits have closed that gap significantly, and 7200 MT/s CL34 is an excellent all-rounder. At stock JEDEC speeds, DDR5-4800 CL40 remains worse in latency than DDR4-3200 CL22 — always enable XMP/EXPO.

Recommendation

  • New build: DDR5, full stop. Target 6000–7200 MT/s with CL30–CL34 for gaming on AM5 or 5600–6400 MT/s on Intel LGA 1851.
  • Existing AM4 system: keep or upgrade DDR4 kit (3600–4000 range), no platform change needed.
  • Existing LGA 1700 system: DDR4-3600 to 4800 with XMP is the ceiling — plan your next upgrade around a platform change.