Left · Western Digital
WD Black SN850X 2TB
Spec score
Spec score 88
$399
typical price
WD Black SN850X 2TB against WD Blue 4TB
WD Black SN850X 2TB leads on the overall index. The price beside each button is the Amazon US reading where ScoutPrices has one; the comparison below is worked on typical prices.
Right · Western Digital
WD Blue 4TB
Spec score
Spec score 12
$79
typical price
Head to head
Scores
Indices out of 100 on ScoutSpecs' own scale, one per kind of work. They are not frames per second and not a measurement of any one sample.
Spec score
WD Black SN850X 2TB: 88
WD Blue 4TB: 12
76 ptsto the left
Price and value
Worked on typical prices, the figures the comparison is built on.
Value, points per $100
WD Black SN850X 2TB: 22.1
WD Blue 4TB: 15.2
45%to the left
Typical price
WD Black SN850X 2TB: $399
WD Blue 4TB: $79
$320to the right
From the spec sheets
Capacity
WD Black SN850X 2TB: 2000 GB
WD Blue 4TB: 4000 GB
100%to the right
Sequential read
WD Black SN850X 2TB: 7300 MB/s
WD Blue 4TB: 180 MB/s
3956%to the left
Sequential write
WD Black SN850X 2TB: 6600 MB/s
WD Blue 4TB: 180 MB/s
3567%to the left
The verdict
- The WD Black SN850X 2TB scores 633% higher on the ScoutSpecs index.
- The WD Blue 4TB typically costs $320 less.
- Per dollar, the WD Black SN850X 2TB is the better buy: 22.1 points per $100 against 15.2.
Specifications
| Spec | WD Black SN850X 2TB | WD Blue 4TB |
|---|---|---|
| Interface | NVMe PCIe 4.0 | Hard drive |
| Capacity | 2 TB | 4 TB (better) |
| Sequential read | 7,300 MB/s (better) | 180 MB/s |
| Sequential write | 6,600 MB/s (better) | 180 MB/s |
| DRAM cache | Yes (better) | No |
| Brand | Western Digital | Western Digital |
| Released | 2022 (better) | 2019 |
| Typical price | $399 | $79 (better) |
The better figure of each pair is in green, with a tick.