WD Black SN850X against WD Black SN850X
WD Black SN850X leads on the overall index. Typical prices, not live ones.
The verdict
- WD Black SN850X and WD Black SN850X are level on spec score.
- The WD Black SN850X typically costs $470 less.
- Per dollar, the WD Black SN850X is the better buy: 32.6 points per $100 against 12.4.
Head to head
| Measure | WD Black SN850X | WD Black SN850X | Gap |
|---|---|---|---|
| Spec score | 91 | 93 | 2 ptsright |
| Value, points per $100 | 32.6 | 12.4 | 163%left |
| Typical price | $279 | $749 | $470left |
| Capacity | 4000 GB | 8000 GB | 100%right |
| Sequential read | 7300 MB/s | 7300 MB/s | level |
| Sequential write | 6600 MB/s | 6600 MB/s | level |
Specifications
| Spec | WD Black SN850X | WD Black SN850X |
|---|---|---|
| Interface | NVMe PCIe 4.0 | NVMe PCIe 4.0 |
| Capacity | 4 TB | 8 TB |
| Sequential read | 7,300 MB/s | 7,300 MB/s |
| Sequential write | 6,600 MB/s | 6,600 MB/s |
| DRAM cache | Yes | Yes |
| Brand | Western Digital | Western Digital |
| Released | 2023 | 2025 |
| Typical price | $279 | $749 |