WD Black SN770 4TB · bare
PCIe 4.0 · 5150/4900 MB/s · 4TB
WD BLACK SN8100 1TB
1TB · PCIe 5.0 NVMe · 14,900 MB/s read · PassMark #33
WD Black SN770 4TB · bare takes it — here’s why.
In our weighted Specdex score, WD Black SN770 4TB · bare lands at 86 and WD BLACK SN8100 1TB at 77. That puts WD Black SN770 4TB · bare ahead by 9 points — a decisive margin driven mostly by its strengths in the categories below.
Pick WD Black SN770 4TB · bare if…
- ✓M.2 NVMe
- ✓Competitive per-GB cost
- ✓TBW scales with capacity
Pick WD BLACK SN8100 1TB if…
- ✓Strong PCIe 5.0 performance at PassMark rank #33
- ✓PCIe 5.0 interface for next-gen platforms (AM5, LGA 1851)
Winner by scenario
Derived from the sub-score breakdown · not a separate testValue for money
WD BLACK SN8100 1TBSpecdex score per dollar at MSRP
WD BLACK SN8100 1TB more score per dollar ($179 vs $360).
Score breakdown
Specs side-by-side
| Spec | WD Black SN770 4TB · bare | WD BLACK SN8100 1TB |
|---|---|---|
| Interface | PCIe 4.0 | PCIe 5.0 x4 NVMe 2.0 |
| Capacity | 4TB | — |
| Read/Write | 5150/4900 MB/s | — |
| Form factor | — | M.2 2280 (single-sided) |
| Sequential read | — | 14,900 MB/s |
| Sequential write | — | 11,000 MB/s |
| Random read | — | 1,600,000 IOPS |
| Random write | — | 2,400,000 IOPS |
| Controller | — | SanDisk-tuned Silicon Motion SM2508 (6nm, quad Cortex-R8) |
| NAND | — | 218-layer BiCS8 CBA 3D TLC |
| DRAM | — | yes (onboard DRAM) |
| Endurance | — | 600 TBW |
| Warranty | — | 5 years |
| PassMark Disk Score | — | 81,741 |
| PassMark rank | — | #33 of 100 consumer SSDs |
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
WD BLACK SN8100 1TB
- +Strong PCIe 5.0 performance at PassMark rank #33
- +PCIe 5.0 interface for next-gen platforms (AM5, LGA 1851)
- −PCIe 5.0 drives run hot — heatsink or motherboard M.2 cooling recommended
- −Pricing varies — confirm current retail before purchase
FAQ: WD Black SN770 4TB · bare vs WD BLACK SN8100 1TB
Which is better, WD Black SN770 4TB · bare or WD BLACK SN8100 1TB? +
WD Black SN770 4TB · bare scores 86 on our weighted rubric — ahead by 9. Your best pick depends on the sub-scores above.
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.
Is WD BLACK SN8100 1TB worth the price? +
At $179, WD BLACK SN8100 1TB delivers a Specdex score of 77 — strongest in passmark_disk.
Does WD Black SN770 4TB · bare or WD BLACK SN8100 1TB 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 Black SN770 4TB · bare or WD BLACK SN8100 1TB? +
WD BLACK SN8100 1TB — more score per dollar ($179 vs $360). Specdex score per dollar at MSRP.