Everything that decides whether the WD Black SN7100 is the right drive: controller, DRAM, NAND, rated endurance, PS5 and laptop fit, and how it compares with the obvious alternatives. Hardware facts are taken from the reviews and datasheets listed at the bottom; capacities and speeds come from our comparison of 60 drives.
Who it’s for: Laptops, compact PCs and the PS5 (with a heatsink): it is among the fastest DRAM-less Gen 4 drives tested and draws little power, so it suits machines where heat and battery life matter more than sustained heavy writes. Skip it for: Workloads with lots of random writes across a full drive, where DRAM drives keep their speed better.
| Controller | WD/SanDisk in-house 4-channel controller (Polaris 3) |
| DRAM cache | No — DRAM-less, uses 64 MB of host memory (HMB) |
| NAND | Kioxia/SanDisk BiCS8 TLC (218-layer) |
| Interface | PCIe 4.0 x4, NVMe, M.2 2280 |
| Heatsink version | Not in our data — sold bare |
| Capacity | Seq. read | Seq. write | Endurance | Warranty |
|---|---|---|---|---|
| 1 TB | 7,250 MB/s | 6,900 MB/s | 600 TBW | 5 yr |
| 2 TB | 7,250 MB/s | 6,900 MB/s | 1,200 TBW | 5 yr |
Rated endurance is 300 TBW at 500GB, 600 TBW at 1TB, 1,200 TBW at 2TB. We could not confirm the rating for the 4TB model from a primary source, so it is left blank. Speeds are the manufacturer’s sequential ratings.
Every WD Black SN7100 capacity in our comparison, smallest first.
| $/TB | $/GB | Price | Capacity | Interface | Gen | Read | Write | NAND | Warranty | Cond. | Product |
|---|---|---|---|---|---|---|---|---|---|---|---|
| $179.99BEST | $0.180 | $179.99 | 1 TB | M.2 NVMe | Gen 4 | 7,250 MB/s | 6,900 MB/s | TLC | 5 yr | New | WD Black SN7100 1TB· 3rd-partyAmazon ↗ |
| $154.50 | $0.154 | $309.00 | 2 TB | M.2 NVMe | Gen 4 | 7,250 MB/s | 6,900 MB/s | TLC | 5 yr | New | WD Black SN7100 2TB· 3rd-partyAmazon ↗ |
Full list of qualifying drives: PS5-compatible SSDs.
Samsung 990 EVO Plus: the closest rival: DRAM-less, TLC, similar power draw.
| WD Black SN7100 | Samsung 990 EVO Plus | |
|---|---|---|
| Interface | PCIe Gen 4 | PCIe Gen 4 |
| Seq. read | 7,250 MB/s | 7,250 MB/s |
| Seq. write | 6,900 MB/s | 6,300 MB/s |
| NAND | TLC | TLC |
| DRAM cache | No (HMB) | No (HMB) |
| Warranty | 5 yr | 5 yr |
We show retail prices only while we can refresh them at least every 24 hours. For market context: TrendForce’s 16 Oct 2026 retail sample runs $133–$250 per TB for mainstream 1–2TB drives, and NAND contract prices are forecast +15 to +20% for 4Q26. Check any listing against that range with the price per TB calculator, and see the SSD price chart for the trend.
Hardware facts on this page come from:
Where reviews disagreed (for example on NAND layer counts or a capacity’s endurance rating) we state only what the sources agree on.