WD Blue SN580 1TB · bare
PCIe 4.0 · 4150/4150 MB/s · 1TB
WD Black SN770 4TB · bare
PCIe 4.0 · 5150/4900 MB/s · 4TB
Dead heat — it comes down to priorities.
In our weighted Specdex score, WD Blue SN580 1TB · bare lands at 86 and WD Black SN770 4TB · bare at 86. With scores tied, the decision hinges on which sub-scores matter most to you.
Pick WD Blue SN580 1TB · bare if…
- ✓M.2 NVMe
- ✓Competitive per-GB cost
- ✓TBW scales with capacity
Pick WD Black SN770 4TB · bare if…
- ✓M.2 NVMe
- ✓Competitive per-GB cost
- ✓TBW scales with capacity
Winner by scenario
Derived from the sub-score breakdown · not a separate testEndurance & reliability
TieWrite endurance and long-term dependability
Effectively tied — neither pulls a 2-point weighted lead.
Value for money
WD Blue SN580 1TB · bareSpecdex score per dollar at MSRP
WD Blue SN580 1TB · bare more score per dollar ($90 vs $360).
Score breakdown
Specs side-by-side
| Spec | WD Blue SN580 1TB · bare | WD Black SN770 4TB · bare |
|---|---|---|
| Interface | PCIe 4.0 | PCIe 4.0 |
| Capacity | 1TB | ▲ 4TB |
| Read/Write | 4150/4150 MB/s | 5150/4900 MB/s |
WD Blue SN580 1TB · 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 SN770 4TB · 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
FAQ: WD Blue SN580 1TB · bare vs WD Black SN770 4TB · bare
Which is better, WD Blue SN580 1TB · bare or WD Black SN770 4TB · bare? +
Both score 86 on our weighted rubric — tied. Your best pick depends on the sub-scores above.
Is WD Blue SN580 1TB · bare worth the price? +
At $90, WD Blue SN580 1TB · bare delivers a Specdex score of 86 — strongest in read.
Is WD Black SN770 4TB · bare worth the price? +
At $360, WD Black SN770 4TB · bare delivers a Specdex score of 86 — strongest in read.
Does WD Blue SN580 1TB · bare or WD Black SN770 4TB · bare 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 the better value, WD Blue SN580 1TB · bare or WD Black SN770 4TB · bare? +
WD Blue SN580 1TB · bare — more score per dollar ($90 vs $360). Specdex score per dollar at MSRP.