Seagate FireCuda 540 2TB
PCIe 5.0 · 10,000 MB/s
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, Seagate FireCuda 540 2TB lands at 89 and WD_BLACK SN850X 2 TB at 90. That puts WD_BLACK SN850X 2 TB ahead by 1 points — a narrow margin driven mostly by its strengths in the categories below.
Pick Seagate FireCuda 540 2TB if…
- ✓First-wave PCIe 5.0 SSD
- ✓Impressive throughput
- ✓Great for creators
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 90).
Value for money
WD_BLACK SN850X 2 TBSpecdex score per dollar at MSRP
WD_BLACK SN850X 2 TB more score per dollar ($219 vs $269).
Score breakdown
Specs side-by-side
| Spec | Seagate FireCuda 540 2TB | WD_BLACK SN850X 2 TB |
|---|---|---|
| Interface | PCIe 5.0 x4 NVMe | PCIe 4.0 x4 NVMe 1.4 |
| Read speed | 10,000 MB/s | — |
| Write speed | 10,000 MB/s | — |
| TBW | 2000 | — |
| Capacity | — | 1 / 2 / 4 / 8 TB |
| Sequential read | — | 7300 MB/s |
| Sequential write | — | 6600 MB/s |
| NAND | — | BiCS5 TLC |
| Endurance | — | 1200 TBW (2TB) |
| Warranty | — | 5 years |
Seagate FireCuda 540 2TB
- +First-wave PCIe 5.0 SSD
- +Impressive throughput
- +Great for creators
- −Needs heatsink or it throttles
- −Pricey
- −Crucial T705 faster
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: Seagate FireCuda 540 2TB vs WD_BLACK SN850X 2 TB
Which is better, Seagate FireCuda 540 2TB or WD_BLACK SN850X 2 TB? +
WD_BLACK SN850X 2 TB scores 90 on our weighted rubric — ahead by 1. Your best pick depends on the sub-scores above.
Is Seagate FireCuda 540 2TB worth the price? +
At $269, Seagate FireCuda 540 2TB delivers a Specdex score of 89 — 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 Seagate FireCuda 540 2TB 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, Seagate FireCuda 540 2TB or WD_BLACK SN850X 2 TB? +
WD_BLACK SN850X 2 TB — leads on endurance (92 vs 90). Write endurance and long-term dependability.
Which is the better value, Seagate FireCuda 540 2TB or WD_BLACK SN850X 2 TB? +
WD_BLACK SN850X 2 TB — more score per dollar ($219 vs $269). Specdex score per dollar at MSRP.