Left · Lexar
Lexar NM790 4TB
Spec score
Spec score 79
$700
Amazon US, Oct 24
Lexar NM790 4TB against WD Black SN850X 8TB
WD Black SN850X 8TB 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 Black SN850X 8TB
Spec score
Spec score 93
$1,600
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
Lexar NM790 4TB: 79
WD Black SN850X 8TB: 93
14 ptsto the right
Price and value
Worked on typical prices, the figures the comparison is built on.
Value, points per $100
Lexar NM790 4TB: 14.1
WD Black SN850X 8TB: 5.8
143%to the left
Typical price
Lexar NM790 4TB: $562
WD Black SN850X 8TB: $1,600
$1,038to the left
From the spec sheets
Capacity
Lexar NM790 4TB: 4000 GB
WD Black SN850X 8TB: 8000 GB
100%to the right
Sequential read
Lexar NM790 4TB: 7400 MB/s
WD Black SN850X 8TB: 7300 MB/s
1%to the left
Sequential write
Lexar NM790 4TB: 6500 MB/s
WD Black SN850X 8TB: 6600 MB/s
2%to the right
The verdict
- The WD Black SN850X 8TB scores 18% higher on the ScoutSpecs index.
- The Lexar NM790 4TB typically costs $1,038 less.
- Per dollar, the Lexar NM790 4TB is the better buy: 14.1 points per $100 against 5.8.
Specifications
| Spec | Lexar NM790 4TB | WD Black SN850X 8TB |
|---|---|---|
| Interface | NVMe PCIe 4.0 | NVMe PCIe 4.0 |
| Capacity | 4 TB | 8 TB (better) |
| Sequential read | 7,400 MB/s (better) | 7,300 MB/s |
| Sequential write | 6,500 MB/s | 6,600 MB/s (better) |
| DRAM cache | No | Yes (better) |
| Brand | Lexar | Western Digital |
| Released | 2023 | 2025 (better) |
| Typical price | $562 (better) | $1,600 |
The better figure of each pair is in green, with a tick.