WD_BLACK SN7100 Spec and Price in the United Kingdom
Released November 21, 2024
Released in late 2024, the SN7100 replaces WD_BLACK's DRAM cache with a 4-channel Polaris 3 controller and host memory buffer, yet still matches the SN850X on sequential speed at 7,250/6,900 MB/s and actually edges ahead on random write IOPS at 1.4 million. That combination of DRAM-less efficiency and gen4 flagship-level throughput makes it the leaner, newer alternative within the WD_BLACK line for gamers who don't need a physical cache chip. Endurance and warranty terms carry over unchanged at 1,200TB and 5 years.
Tied 26th of 106 models in the SSD catalog on Sequential read — 3 models share this figure. Tied 16th of 106 models in the SSD catalog on Sequential write — 4 models share this figure.
Prices include VAT.
The last tracked price for the 500GB WD_BLACK SN7100 in the United Kingdom was £103.79 at Amazon.co.uk, captured 2026-10-12. Across one tracked merchant and 428 days of recorded prices, the 90-day median for the 500GB WD_BLACK SN7100 is £106.99 and the lowest recorded price is £39.99. This site began capturing prices on July 30, 2026; for Amazon listings, prices dated earlier come from Keepa's price history.
Captured periodically and may have changed.
- 500GB
- 1TB
- 2TB
- 4TB
Each point is one day's recorded price, not a list price. Points dated before July 30, 2026, when this site began capturing prices, come from Keepa's Amazon price history. How we track prices
Specifications
- Capacity
- 2TB
- Interface
- NVME
- Sequential read
- 7250 MB/s
- Sequential write
- 6900 MB/s
- Random read
- 1000000 IOPS
- Random write
- 1400000 IOPS
- PCIe generation
- 4
- Form factor
- M.2 2280
- NAND type
- TLC
- DRAM cache
- Controller
- WD/SanDisk in-house Polaris 3 (4-channel, DRAM-less)
- Endurance (TBW)
- 1200 TB
- Warranty
- 5 years
Capacities
| Configuration | Part number | Endurance (TBW) | Sequential write | Sequential read | Current best price | Price per TB |
|---|---|---|---|---|---|---|
| 500GB | WDS500G4X0E-00CJA0 | 300 TB | 5800 MB/s | 6800 MB/s | £103.79 Price too old to confirm | — |
| 1TB | WDS100T4X0E-00CJA0 | 600 TB | 6900 MB/s | 7250 MB/s | £159.95 Price too old to confirm | — |
| 2TB | WDS200T4X0E-00CJA0 | 1200 TB | 6900 MB/s | 7250 MB/s | £244.99 Price too old to confirm | — |
| 4TB | WDS400T4X0E-00CJA0 | 2400 TB | 6700 MB/s | 7000 MB/s | £472.00 Price too old to confirm | — |
What owners and reviewers say
Summarised from 1 source(s), reviewed September 13, 2026. A source is counted only where it names this model exactly. How we track prices
Commonly praised
- Extremely power-efficient with excellent random read performance.
Commonly criticised
- Mediocre all-around performance, no largest-capacity model at launch, and priced above its sibling at review time.
Sources behind this summary
Guides for this category
Sources
Every spec above was pulled from one of these — a field a source didn't state was left off rather than estimated.