Western Digital
WD_BLACK SN850X 2 TB
PCIe 4.0 · 7300 MB/s · Heatsink option
90
/ 100
From $219
VS
Samsung 9100 Pro 2TB wins by 5
Samsung
Samsung 9100 Pro 2TB
PCIe 5.0 · 14.8 GB/s · TLC
95
/ 100
From $269
Specdex verdict
Samsung 9100 Pro 2TB takes it — here’s why.
In our weighted Specdex score, WD_BLACK SN850X 2 TB lands at 90 and Samsung 9100 Pro 2TB at 95. That puts Samsung 9100 Pro 2TB ahead by 5 points — a decisive margin driven mostly by its strengths in the categories below.
Pick WD_BLACK SN850X 2 TB if…
- ✓Best PCIe 4.0 sustained speed under load
- ✓5-year warranty
- ✓Excellent gaming/load times
Pick Samsung 9100 Pro 2TB if…
- ✓Class-leading PCIe 5.0 sequentials
- ✓5-year warranty
- ✓Magician software polished
WD_BLACK SN850X 2 TB 90
vs 95 Samsung 9100 Pro 2TB
Score breakdown
WD_BLACK SN850X 2 TB
90 speed 92
endurance 92
software 86
value 88
reliability 96
Samsung 9100 Pro 2TB
95 speed 100
endurance 92
software 96
value 80
reliability 92
Specs side-by-side
| Spec | WD_BLACK SN850X 2 TB | Samsung 9100 Pro 2TB |
|---|---|---|
| Capacity | 1 / 2 / 4 / 8 TB | 1 / 2 / 4 / 8 TB |
| Interface | PCIe 4.0 x4 NVMe 1.4 | PCIe 5.0 x4 NVMe 2.0 |
| Sequential read | 7300 MB/s | 14800 MB/s |
| Sequential write | 6600 MB/s | 13400 MB/s |
| NAND | BiCS5 TLC | Samsung V8 V-NAND TLC |
| Endurance | 1200 TBW (2TB) | 1200 TBW (2TB) |
| Warranty | 5 years | 5 years |
WD_BLACK SN850X 2 TB
Pros
- +Best PCIe 4.0 sustained speed under load
- +5-year warranty
- +Excellent gaming/load times
Cons
- −PCIe 4.0 not 5.0
- −Game Mode 2.0 is software gimmick
- −Premium pricing per TB
Samsung 9100 Pro 2TB
Pros
- +Class-leading PCIe 5.0 sequentials
- +5-year warranty
- +Magician software polished
Cons
- −Runs hot — heatsink recommended
- −Premium pricing
- −TLC vs newer V-NAND mixed reception
FAQ: WD_BLACK SN850X 2 TB vs Samsung 9100 Pro 2TB
Which is better, WD_BLACK SN850X 2 TB or Samsung 9100 Pro 2TB? +
Samsung 9100 Pro 2TB scores 95 on our weighted rubric — ahead by 5. Your best pick depends on the sub-scores above.
Is WD_BLACK SN850X 2 TB worth the price? +
At $219, WD_BLACK SN850X 2 TB delivers a Specdex score of 90 — strongest in reliability.
Is Samsung 9100 Pro 2TB worth the price? +
At $269, Samsung 9100 Pro 2TB delivers a Specdex score of 95 — strongest in speed.
Does WD_BLACK SN850X 2 TB or Samsung 9100 Pro 2TB 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.