Western Digital
WD Black SN850X 2TB
PCIe 4.0 · 7,300 MB/s · Game Mode 2.0
90
/ 100
From $189
VS
WD Black SN850X 2TB wins by 1
Seagate
Seagate FireCuda 540 2TB
PCIe 5.0 · 10,000 MB/s
89
/ 100
From $269
Specdex verdict
WD Black SN850X 2TB takes it — here’s why.
In our weighted Specdex score, WD Black SN850X 2TB lands at 90 and Seagate FireCuda 540 2TB at 89. That puts WD Black SN850X 2TB ahead by 1 points — a narrow margin driven mostly by its strengths in the categories below.
Pick WD Black SN850X 2TB if…
- ✓Fastest PCIe 4.0 in real-world games
- ✓Excellent endurance
- ✓Optional heatsink for PS5
Pick Seagate FireCuda 540 2TB if…
- ✓First-wave PCIe 5.0 SSD
- ✓Impressive throughput
- ✓Great for creators
Score breakdown
WD Black SN850X 2TB
90 read 94
write 92
endurance 90
value 88
Seagate FireCuda 540 2TB
89 read 94
write 92
endurance 90
value 82
Specs side-by-side
Spec
WD Black SN850X 2TB
Seagate FireCuda 540 2TB
Interface
PCIe 4.0 x4 NVMe
PCIe 5.0 x4 NVMe
Read speed
7,300 MB/s
10,000 MB/s
Write speed
6,600 MB/s
10,000 MB/s
TBW
1200
2000
Form
M.2 2280
—
WD Black SN850X 2TB
Pros
- +Fastest PCIe 4.0 in real-world games
- +Excellent endurance
- +Optional heatsink for PS5
Cons
- −PCIe 4.0 only
- −Runs warm without heatsink
- −Software dated
Seagate FireCuda 540 2TB
Pros
- +First-wave PCIe 5.0 SSD
- +Impressive throughput
- +Great for creators
Cons
- −Needs heatsink or it throttles
- −Pricey
- −Crucial T705 faster
FAQ: WD Black SN850X 2TB vs Seagate FireCuda 540 2TB
Which is better, WD Black SN850X 2TB or Seagate FireCuda 540 2TB? +
WD Black SN850X 2TB scores 90 on our weighted rubric — ahead by 1. Your best pick depends on the sub-scores above.
Is WD Black SN850X 2TB worth the price? +
At $189, WD Black SN850X 2TB delivers a Specdex score of 90 — strongest in read.
Is Seagate FireCuda 540 2TB worth the price? +
At $269, Seagate FireCuda 540 2TB delivers a Specdex score of 89 — strongest in read.
Does WD Black SN850X 2TB or Seagate FireCuda 540 2TB 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.