Western Digital
WD Black SN850X 2TB · bare
PCIe 4.0 · 7300/6600 MB/s · 2TB
86
/ 100
From $180
VS
Samsung
Samsung 990 Pro 4TB
PCIe 4.0 · 7450/6900 MB/s · 4TB
86
/ 100
From $360
Specdex verdict
Dead heat — it comes down to priorities.
In our weighted Specdex score, WD Black SN850X 2TB · bare lands at 86 and Samsung 990 Pro 4TB at 86. With scores tied, the decision hinges on which sub-scores matter most to you.
Pick WD Black SN850X 2TB · bare if…
- ✓M.2 NVMe
- ✓Competitive per-GB cost
- ✓TBW scales with capacity
Pick Samsung 990 Pro 4TB if…
- ✓M.2 NVMe
- ✓Competitive per-GB cost
- ✓TBW scales with capacity
WD Black SN850X 2TB · bare 86
vs 86 Samsung 990 Pro 4TB
Score breakdown
WD Black SN850X 2TB · bare
86 read 90
write 88
endurance 88
value 84
Samsung 990 Pro 4TB
86 read 90
write 88
endurance 88
value 84
Specs side-by-side
| Spec | WD Black SN850X 2TB · bare | Samsung 990 Pro 4TB |
|---|---|---|
| Interface | PCIe 4.0 | PCIe 4.0 |
| Capacity | 2TB | ▲ 4TB |
| Read/Write | 7300/6600 MB/s | 7450/6900 MB/s |
WD Black SN850X 2TB · bare
Pros
- +M.2 NVMe
- +Competitive per-GB cost
- +TBW scales with capacity
Cons
- −Thermals on Gen 5 drives
- −DRAM-less models slower under sustained load
- −Require heatsinks in many systems
Samsung 990 Pro 4TB
Pros
- +M.2 NVMe
- +Competitive per-GB cost
- +TBW scales with capacity
Cons
- −Thermals on Gen 5 drives
- −DRAM-less models slower under sustained load
- −Require heatsinks in many systems
FAQ: WD Black SN850X 2TB · bare vs Samsung 990 Pro 4TB
Which is better, WD Black SN850X 2TB · bare or Samsung 990 Pro 4TB? +
Both score 86 on our weighted rubric — tied. Your best pick depends on the sub-scores above.
Is WD Black SN850X 2TB · bare worth the price? +
At $180, WD Black SN850X 2TB · bare delivers a Specdex score of 86 — strongest in read.
Is Samsung 990 Pro 4TB worth the price? +
At $360, Samsung 990 Pro 4TB delivers a Specdex score of 86 — strongest in read.
Does WD Black SN850X 2TB · bare or Samsung 990 Pro 4TB last longer? +
Based on our long-term update and support ratings, both ship with multi-year support. Battery and reliability scores are visible in the breakdown above.