Western Digital
WD Black SN850X 4TB
PCIe 4.0 · 7300/6600 MB/s · 4TB
86
/ 100
From $360
VS
Crucial T705 4TB wins by 6
Crucial
Crucial T705 4TB
PCIe 5.0 · 14500/12700 MB/s · 4TB
92
/ 100
From $720
Specdex verdict
Crucial T705 4TB takes it — here’s why.
In our weighted Specdex score, WD Black SN850X 4TB lands at 86 and Crucial T705 4TB at 92. That puts Crucial T705 4TB ahead by 6 points — a decisive margin driven mostly by its strengths in the categories below.
Pick WD Black SN850X 4TB if…
- ✓M.2 NVMe
- ✓Competitive per-GB cost
- ✓TBW scales with capacity
Pick Crucial T705 4TB if…
- ✓M.2 NVMe
- ✓Competitive per-GB cost
- ✓TBW scales with capacity
WD Black SN850X 4TB 86
vs 92 Crucial T705 4TB
Score breakdown
WD Black SN850X 4TB
86 read 90
write 88
endurance 88
value 84
Crucial T705 4TB
92 read 98
write 96
endurance 88
value 84
Specs side-by-side
| Spec | WD Black SN850X 4TB | Crucial T705 4TB |
|---|---|---|
| Interface | PCIe 4.0 | PCIe 5.0 |
| Capacity | 4TB | 4TB |
| Read/Write | 7300/6600 MB/s | 14500/12700 MB/s |
WD Black SN850X 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
Crucial T705 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 4TB vs Crucial T705 4TB
Which is better, WD Black SN850X 4TB or Crucial T705 4TB? +
Crucial T705 4TB scores 92 on our weighted rubric — ahead by 6. Your best pick depends on the sub-scores above.
Is WD Black SN850X 4TB worth the price? +
At $360, WD Black SN850X 4TB delivers a Specdex score of 86 — strongest in read.
Is Crucial T705 4TB worth the price? +
At $720, Crucial T705 4TB delivers a Specdex score of 92 — strongest in read.
Does WD Black SN850X 4TB or Crucial T705 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.