WD Black SN770 2TB · bare
PCIe 4.0 · 5150/4900 MB/s · 2TB
WD_BLACK SN850X 2 TB
PCIe 4.0 · 7300 MB/s · Heatsink option
WD_BLACK SN850X 2 TB takes it — here’s why.
In our weighted Specdex score, WD Black SN770 2TB · bare lands at 86 and WD_BLACK SN850X 2 TB at 90. That puts WD_BLACK SN850X 2 TB ahead by 4 points — a narrow margin driven mostly by its strengths in the categories below.
Pick WD Black SN770 2TB · bare if…
- ✓M.2 NVMe
- ✓Competitive per-GB cost
- ✓TBW scales with capacity
Pick WD_BLACK SN850X 2 TB if…
- ✓Best PCIe 4.0 sustained speed under load
- ✓5-year warranty
- ✓Excellent gaming/load times
Winner by scenario
Derived from the sub-score breakdown · not a separate testEndurance & reliability
WD_BLACK SN850X 2 TBWrite endurance and long-term dependability
WD_BLACK SN850X 2 TB leads on endurance (92 vs 88).
Value for money
WD Black SN770 2TB · bareSpecdex score per dollar at MSRP
WD Black SN770 2TB · bare more score per dollar ($180 vs $219).
Score breakdown
Specs side-by-side
| Spec | WD Black SN770 2TB · bare | WD_BLACK SN850X 2 TB |
|---|---|---|
| Interface | PCIe 4.0 | PCIe 4.0 x4 NVMe 1.4 |
| Capacity | ▲ 2TB | 1 / 2 / 4 / 8 TB |
| Read/Write | 5150/4900 MB/s | — |
| Sequential read | — | 7300 MB/s |
| Sequential write | — | 6600 MB/s |
| NAND | — | BiCS5 TLC |
| Endurance | — | 1200 TBW (2TB) |
| Warranty | — | 5 years |
WD Black SN770 2TB · bare
- +M.2 NVMe
- +Competitive per-GB cost
- +TBW scales with capacity
- −Thermals on Gen 5 drives
- −DRAM-less models slower under sustained load
- −Require heatsinks in many systems
WD_BLACK SN850X 2 TB
- +Best PCIe 4.0 sustained speed under load
- +5-year warranty
- +Excellent gaming/load times
- −PCIe 4.0 not 5.0
- −Game Mode 2.0 is software gimmick
- −Premium pricing per TB
FAQ: WD Black SN770 2TB · bare vs WD_BLACK SN850X 2 TB
Which is better, WD Black SN770 2TB · bare or WD_BLACK SN850X 2 TB? +
WD_BLACK SN850X 2 TB scores 90 on our weighted rubric — ahead by 4. Your best pick depends on the sub-scores above.
Is WD Black SN770 2TB · bare worth the price? +
At $180, WD Black SN770 2TB · bare delivers a Specdex score of 86 — strongest in read.
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.
Does WD Black SN770 2TB · bare or WD_BLACK SN850X 2 TB 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.
Which is better for endurance & reliability, WD Black SN770 2TB · bare or WD_BLACK SN850X 2 TB? +
WD_BLACK SN850X 2 TB — leads on endurance (92 vs 88). Write endurance and long-term dependability.
Which is the better value, WD Black SN770 2TB · bare or WD_BLACK SN850X 2 TB? +
WD Black SN770 2TB · bare — more score per dollar ($180 vs $219). Specdex score per dollar at MSRP.