DDR4 vs DDR5: which memory generation is right for your build?
DDR5 is the right answer for any new build in 2026, as all current-gen platforms use it, kit prices are competitive, and the bandwidth advantage is real for productivity workloads. DDR4 is only the right choice if you're upgrading an existing DDR4 AM4 / LGA1200 / LGA1700 system where replacing the motherboard doesn't make sense.
The memory generation change that's now mainstream, with real caveats.
DDR5 doubles DDR4's per-channel bandwidth (two 32-bit sub-channels per DIMM vs a single 64-bit channel) and more than doubles typical per-module capacity. It's the memory standard every new Intel and AMD platform uses in 2026. But raw latency hasn't improved proportionally: a DDR5-6000 CL30 kit has the same 10 ns first-word latency as DDR4-3200 CL16, and tight-tuned DDR4-3600 CL16 is actually faster in absolute terms.
By TechCompare · Updated
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True latency, converted to nanoseconds
The DDR5 sweet-spot kit (DDR5-6000 CL30) versus the DDR4 mainstream baseline (DDR4-3200 CL16). Note the punchline: despite nearly double the data rate, first-word latency is essentially identical — DDR5's win is bandwidth, not latency.
DDR4-3200 CL16
First-word latency
Peak bandwidth / channel
DDR5-6000 CL30
First-word latency
Peak bandwidth / channel
Latency = CAS (CL) × clock-cycle time. Higher MT/s shortens the cycle, looser CL lengthens the cycle count — the nanosecond figure is what actually reaches the CPU.
Side-by-side specs
| Spec | DDR4 | DDR5 |
|---|---|---|
| Typical mainstream speed | 3200-3600 MT/s | 5600-6400 MT/s (better on this spec) |
| Peak per-channel bandwidth | 25.6 GB/s | 48 GB/s (better on this spec) |
| Best first-word latency | ~8.9 ns (3600 CL16) (better on this spec) | ~10 ns (6000 CL30) |
| Voltage (nominal) | 1.2 V | 1.1 V (better on this spec) |
| On-DIMM voltage regulation | Motherboard | PMIC per module (better on this spec) |
| Max per-module capacity | 32 GB | 64 GB (128 GB emerging) (better on this spec) |
| Channels per DIMM | 1 × 64-bit | 2 × 32-bit sub-channels (better on this spec) |
| Error correction (consumer) | None | On-die ECC (better on this spec) |
| Platform support (2026) | Legacy AM4 / LGA1200/1700 | All current platforms (better on this spec) |
| Relative kit price | Lower (better on this spec) | Slightly higher |
| Good for gaming | Still competitive | Default choice (better on this spec) |
| Good for productivity / VMs | Adequate | Meaningfully better (better on this spec) |
How they differ
DDR5's advantage is bandwidth and capacity, not latency. A DDR5-6000 kit delivers 48 GB/s per channel vs DDR4-3200's 25.6 GB/s, meaningful for memory bandwidth bound workloads like large-scale compilation, video encoding, and running virtual machines. Max per-DIMM capacity doubles (64 GB DDR5 modules ship, DDR4 taps out around 32 GB). On the negative side, DDR5 runs at 1.1 V nominal vs DDR4's 1.2 V (similar idle power, slightly higher under load due to on-module voltage regulation), and early adoption meant higher kit prices, which are now mostly normalized by 2026. Platform compatibility is the forced choice factor: Intel 12th-gen and older Ryzen 5000 use DDR4, Intel Core 15th-gen (LGA1851) and Ryzen 7000/9000 boards require DDR5, and 13th and 14th-gen Intel boards come in both DDR4 and DDR5 variants.
Verdict
On bandwidth, DDR5-6000 delivers 48 GB/s per channel versus DDR4-3200's 25.6 GB/s, a meaningful gap for memory-bound workloads like large compilation, video encoding, and VMs. The trade is latency: a DDR4-3600 CL16 kit hits about 8.9 ns first-word latency, while a DDR5-6000 CL30 kit lands around 10 ns, so tuned DDR4 is actually faster in absolute latency. DDR5 also doubles per-DIMM capacity (64 GB modules shipping, DDR4 taps out around 32 GB), adds on-die ECC, and moves voltage regulation onto the module. The platform lock wins: AM5 / LGA1700-current boards are DDR5-only.
See DDR5-6000 CL30 latencyWhich should you pick?
Choose DDR4
Pick DDR4 only for DDR4-based platform upgrades (Ryzen 5000 on AM4, Core 10th-12th gen on LGA1200/1700), or for ultra-budget builds where a used DDR4 kit is genuinely cheaper.
Compare DDR4-3600 CL16 latencyChoose DDR5
Pick DDR5 for any new platform purchase. Intel Core 15th-gen (LGA1851) and Ryzen 7000/9000 boards require DDR5, while 13th and 14th-gen Intel boards come in both DDR4 and DDR5 variants, and the bandwidth advantage directly translates to performance in memory-heavy workloads.
See DDR5-6000 CL30 latencyRelated comparisons
Frequently asked questions
Does DDR5 have lower latency than DDR4?
Do I have a choice between DDR4 and DDR5 on a new build?
Is DDR5 worth the price premium over DDR4?
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