DDR4-3600 CL16 vs DDR5-6000 CL30: which RAM is actually faster for gaming?
Slightly lower access latency vs double the bandwidth — which matters more?
DDR4-3600 CL16 was the sweet-spot kit for late-stage DDR4 platforms (Intel 12th-14th gen, AMD AM4). DDR5-6000 CL30 is the current sweet spot for DDR5 (Intel 15th gen+, AMD AM5). DDR4 has slightly lower true latency: 8.9 ns vs 10.0 ns. DDR5 has roughly double the bandwidth: ~48 GB/s read vs ~96 GB/s. For gaming, the difference is often within margin of error. For productivity, DDR5 pulls ahead meaningfully.
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Side-by-side specs
| Spec | DDR4-3600 CL16 | DDR5-6000 CL30 |
|---|---|---|
| Frequency | 3600 MT/s | 6000 MT/s (better on this spec) |
| CAS latency (cycles) | 16 (better on this spec) | 30 |
| True latency (ns) | 8.89 ns (better on this spec) | 10.0 ns |
| Bandwidth (read) | ~48 GB/s | ~96 GB/s (better on this spec) |
| Bank groups | 16 | 32 (better on this spec) |
| Gaming fps difference | Within 0-3% | Within 0-3% |
| Productivity gain | Baseline | +10-20% (better on this spec) |
| Kit price (2×16 GB) | $50-80 (better on this spec) | $90-130 |
How they differ
True latency calculation: (CAS latency ÷ frequency) × 2000. DDR4-3600 CL16: (16 ÷ 3600) × 2000 = 8.89 ns. DDR5-6000 CL30: (30 ÷ 6000) × 2000 = 10.0 ns. The DDR4 kit is about 11% lower latency per access. But DDR5 runs at double the transfer rate and has twice the bank groups (32 vs 16), letting it handle more concurrent read/write operations. In gaming benchmarks at 1440p and 4K, the framerate difference between these two kits is typically 0-3%, well within run-to-run variance. In productivity workloads (video export, code compilation, 7-Zip compression), DDR5 pulls 10-20% ahead. The bigger factor: if you're on an AM4 or LGA1700 DDR4 platform, upgrading to this kit is a drop-in $50-80 improvement. If you're building new on AM5 or LGA1851, DDR5 is the only choice.
Verdict
If you already own a DDR4 platform, a DDR4-3600 CL16 kit is an excellent value upgrade. If you're building new, DDR5-6000 CL30 is the correct choice — the platform won't take DDR4. Both are the sweet spot for their respective generations and neither will bottleneck your gaming performance.
Calculate your RAM latencyWhich should you pick?
Choose DDR4-3600 CL16
You're on a DDR4 platform (AM4, Intel 12th-14th gen) and want the best price-to-performance RAM upgrade. Gaming is your primary use case and you don't need DDR5 bandwidth for productivity.
Choose DDR5-6000 CL30
You're building a new PC on AM5 or LGA1851. You do productivity work that benefits from bandwidth (rendering, compilation, compression). You want the current-gen standard.