Samsung 990 EVO Plus vs WD_BLACK SN8100 at every capacity: prices, $/TB, speeds, endurance. Which to buy in July 2026 — full family comparison.
Comparing Samsung 990 EVO Plus against WD_BLACK SN8100 model-to-model means looking across the whole capacity range: the winner at 1 TB isn't always the winner at 4 TB, because per-TB pricing shifts with capacity. Here's the full picture.
The WD_BLACK SN8100 posts the higher sequential read spec (14,900 MB/s vs 7,250 MB/s). Whether that shows up for you depends on workload: game load times won't change, sustained transfers will.
On value, the Samsung 990 EVO Plus family wins at most capacities — its best configuration lands at $146.25/TB versus $175.00/TB for the WD_BLACK SN8100's best. During the 2026 NAND shortage that spread compounds quickly at 2-4 TB.
Architecturally, the WD_BLACK SN8100 family uses a dedicated DRAM cache while the Samsung 990 EVO Plus relies on HMB (Host Memory Buffer). For OS and gaming duty they behave identically; sustained random writes favor DRAM.
| Capacity | Samsung 990 EVO Plus | WD_BLACK SN8100 | |
|---|---|---|---|
| 1 TB | $244 · $244.00/TB | — | |
| 2 TB | $369 · $184.50/TB | $380 · $190.00/TB | Full comparison → |
| 4 TB | $585 · $146.25/TB | $700 · $175.00/TB | Full comparison → |