Samsung 990 PRO vs WD Blue SN5100 at every capacity: prices, $/TB, speeds, endurance. Which to buy in July 2026 — full family comparison.
Samsung 990 PRO and WD Blue SN5100 compete at every capacity where both are sold, so the real question isn't a single price tag — it's which family gives you more per terabyte at the capacity you actually need. The table below breaks that down.
Peak sequential read favors the Samsung 990 PRO at 7,450 MB/s against 6,600 MB/s. For gaming and general desktop use the difference is imperceptible; for large-file work it's measurable.
The WD Blue SN5100 family is the value pick — $182.00/TB at its cheapest configuration versus $194.00/TB for the Samsung 990 PRO. The Samsung 990 PRO has to win on features (cache, endurance, brand support) to justify its premium.
The cache design differs: Samsung 990 PRO carries on-board DRAM, WD Blue SN5100 borrows system RAM via HMB. This matters for database-style workloads and long video-editing sessions, not for everyday use.
| Capacity | Samsung 990 PRO | WD Blue SN5100 | |
|---|---|---|---|
| 1 TB | $239 · $239.00/TB | $182 · $182.00/TB | Full comparison → |
| 2 TB | $388 · $194.00/TB | — | |
| 4 TB | $825 · $206.25/TB | — |