Left · Western Digital
WD Black SN850X 4TB
Spec score
Spec score 91
$787
Amazon US, Oct 24
WD Black SN850X 4TB against WD Blue SN580 1TB
WD Black SN850X 4TB 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 SN580 1TB
Spec score
Spec score 64
$298
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 4TB: 91
WD Blue SN580 1TB: 64
27 ptsto the left
Price and value
Worked on typical prices, the figures the comparison is built on.
Value, points per $100
WD Black SN850X 4TB: 14
WD Blue SN580 1TB: 21.5
54%to the right
Typical price
WD Black SN850X 4TB: $650
WD Blue SN580 1TB: $298
$352to the right
From the spec sheets
Capacity
WD Black SN850X 4TB: 4000 GB
WD Blue SN580 1TB: 1000 GB
300%to the left
Sequential read
WD Black SN850X 4TB: 7300 MB/s
WD Blue SN580 1TB: 4150 MB/s
76%to the left
Sequential write
WD Black SN850X 4TB: 6600 MB/s
WD Blue SN580 1TB: 4150 MB/s
59%to the left
The verdict
- The WD Black SN850X 4TB scores 42% higher on the ScoutSpecs index.
- The WD Blue SN580 1TB typically costs $352 less.
- Per dollar, the WD Blue SN580 1TB is the better buy: 21.5 points per $100 against 14.
Specifications
| Spec | WD Black SN850X 4TB | WD Blue SN580 1TB |
|---|---|---|
| Interface | NVMe PCIe 4.0 | NVMe PCIe 4.0 |
| Capacity | 4 TB (better) | 1 TB |
| Sequential read | 7,300 MB/s (better) | 4,150 MB/s |
| Sequential write | 6,600 MB/s (better) | 4,150 MB/s |
| DRAM cache | Yes (better) | No |
| Brand | Western Digital | Western Digital |
| Released | 2023 | 2023 |
| Typical price | $650 | $298 (better) |
The better figure of each pair is in green, with a tick.