Western Digital SN8100 1 TB: WD's Silicon Motion SM2508 Flagship (2026)
The Western Digital SN8100 1 TB is WD's first PCIe 5.0 flagship, pairing a Silicon Motion SM2508 with Kioxia BiCS8 TLC for 14,900 MB/s reads and unusually low Gen5 power draw.
Controller & Memory
The Western Digital SN8100 1 TB is the entry capacity of WD's first PCIe 5.0 NVMe line, and the drive that breaks the Phison E26 monopoly on flagship Gen5 performance. Under the heatsink sits a Silicon Motion SM2508 eight-channel controller built on TSMC's 6 nm process, paired with Kioxia BiCS8 218-layer 3D TLC NAND at 3,600 MT/s, a discrete DRAM cache, and Silicon Motion's NANDXtend ECC. WD rates every capacity in the family at 14,900 MB/s sequential reads, 14,000 MB/s writes, and up to 2.3 million random read IOPS and 2.4 million random write IOPS over a PCIe 5.0 x4 link, and the headline across every independent review is that the SM2508's efficiency focus lets the SN8100 hit those numbers at lower power and lower thermals than competing Phison E26 drives such as the Crucial T705.
WD sells the SN8100 family across 1 TB, 2 TB, and 4 TB today, with an 8 TB SKU due later in 2026; peak speeds and IOPS are identical across capacities, and only endurance scales, at 600 TBW per terabyte. The 1 TB carries the 600 TBW rating, against 1,200 TBW on the 2 TB, 2,400 TBW on the 4 TB, and 4,800 TBW on the announced 8 TB. Compatibility is the standard Gen5 story: the drive earns its keep only in a recent AMD 600-series or Intel 700-series desktop with a PCIe 5.0 M.2 slot, it is largely wasted in a laptop, and in a PlayStation 5 it runs at half speed, since the console slot is PCIe 4.0. The base SN8100 ships bare with no heatsink in the box, and although the SM2508 runs cooler than the E26, sustained Gen5 writes still push the controller hard enough that motherboard heatsink coverage is close to mandatory; WD also sells a factory heatsink variant for builders without one.
On the shelf the closest rivals are the Crucial T705 and Seagate FireCuda 540 on the Phison E26 Gen5 tier, the Samsung 9100 Pro at the top of the Gen5 stack, and the Kingston Fury Renegade G5, which shares the same SM2508 silicon and reviews treat as near-identical hardware. For buyers not chasing synthetic bandwidth, a PCIe 4.0 flagship like the Samsung 990 Pro or WD's own Black SN850X matches the SN8100's real-world game load times at roughly half the price, and is the more honest fit for a PCIe 4.0-only board or a PlayStation 5.
Storage Comparisons:
SN8100 Performance & Benchmarks
Independent reviewers consistently report the SN8100 is the fastest consumer NVMe SSD they have measured. Tom's Hardware titles its review 'the fastest overall consumer SSD ever made,' TweakTown frames the random-access latency as 'approaching Optane,' and TechPowerUp notes the drive 'claims top spot in power efficiency.' On the 1 TB capacity specifically, WD rates sequential reads at 14,900 MB/s, writes at 14,000 MB/s, random reads at 2.3 million IOPS, and random writes at 2.4 million IOPS over a PCIe 5.0 x4 link, numbers that essentially saturate the Gen5 x4 ceiling and match the larger capacities bar for bar.
WESTERN DIGITAL SN8100 1 TB vs M.2 5.0 peers
Switch between sequential throughput and random IOPS to see how this drive stacks up against other M.2 5.0 SSDs in our database. The highlighted bar is the drive on this page — click any other bar to open that drive.
- WESTERN DIGITAL SN8100 1 TB (this drive): 14,900 MB/s read, 14,000 MB/s write
- Corsair MP700 Pro XT 1 TB: 14,900 MB/s read, 14,200 MB/s write
- Corsair MP700 Pro XT 2 TB: 14,900 MB/s read, 14,500 MB/s write
- Corsair MP700 Pro XT 4 TB: 14,900 MB/s read, 14,400 MB/s write
- Crucial T710 1 TB: 14,900 MB/s read, 13,800 MB/s write
The leap over PCIe 4.0 is real on paper and modest in practice for gaming. Game load times, usually bounded by the CPU and asset decompression rather than storage, barely move against a Samsung 990 Pro or WD Black SN850X. Where 14,900 MB/s earns its keep is on large sequential workloads: moving a 100 GB project folder, scrubbing 4K or 8K footage in a video editor, or feeding DirectStorage-enabled titles that stream textures straight from the SSD. Like every Gen5 drive, the SN8100 leans on an SLC cache that absorbs writes at full speed until it fills, after which writes settle to the native Kioxia TLC rate. The 1 TB carries the smallest cache in the family, so under a long contiguous write it drops out of burst earliest, the main reason a video workload justifies stepping up to the 2 TB. The SM2508's genuine edge over Phison E26 rivals is sustained performance under load: lower peak power draw, less thermal throttling, and the efficiency to hold rated speeds longer than the E26 competition.
WESTERN DIGITAL SN8100 vs Competitors
See how the SN8100 stacks up against other M.2 5.0 drives in our database:
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Endurance, TBW & Warranty
WD covers the SN8100 1 TB with a five-year limited warranty, ending early only if the 600 TBW endurance rating is exceeded, whichever comes first. That 600 TBW figure is the entry point of a lineup that scales at 600 TBW per terabyte of Kioxia BiCS8 TLC: 600 TBW on the 1 TB, 1,200 TBW on the 2 TB, 2,400 TBW on the 4 TB, and 4,800 TBW on the announced 8 TB. At a typical consumer workload of around 20 GB of writes per day, the 1 TB would need more than 80 years to exhaust the NAND, so in practice the warranty term expires long before the flash does; even a heavier 50 GB-per-day routine still clears three decades. WD rates the drive at up to two million hours MTBF, though StorageReview's testing recorded a 1.75 million hour MTTF figure; treat either number as a population-reliability statistic describing expected failures across a large fleet, not a lifespan guarantee for any single unit.
WESTERN DIGITAL SN8100 1 TB Specifications
| Category | Value |
|---|---|
| Capacity [?] | 1 TB |
| Interface [?] | M.2 5.0 |
| Controller [?] | Silicon Mortion SM2508 |
| Memory type [?] | Kioxia 3D TLC |
| DRAM [?] | Yes |
| Read speed (MB/s) [?] | 14900 |
| Write speed (MB/s) [?] | 14000 |
| Read IOPS [?] | 2300000 |
| Write IOPS [?] | 2400000 |
| Endurance (TBW) [?] | 600 |
| MTBF (million hours) [?] | 2000000 |
| Warranty (years) [?] | 5 |
Verdict: Is the SN8100 Worth It in 2026?
Buy the Western Digital SN8100 1 TB for a PCIe 5.0-capable desktop when the goal is the strongest real-world Gen5 performance per watt, since the Silicon Motion SM2508 delivers the same 14,900 MB/s peak as the Phison E26 competition at lower power and lower thermals. Skip it on a PCIe 4.0-only board, where the drive runs at half speed and a Samsung 990 Pro 1 TB matches its real-world responsiveness at roughly half the price, and pass on it for a PlayStation 5, whose PCIe 4.0 expansion slot cannot use the Gen5 bandwidth. The closest alternative is the Kingston Fury Renegade G5, which uses the same SM2508 silicon and lands within a hair of the SN8100 on every benchmark, or the Samsung 9100 Pro for buyers who want the very top of the Gen5 stack regardless of efficiency. The verdict on the SN8100 1 TB is a genuine flagship: the first WD Gen5 drive, and the one that makes the SM2508 a real rival to Phison's E26.
+ Pros
- 14,900 MB/s sequential reads over PCIe 5.0
- Silicon Motion SM2508 6 nm Gen5 controller
- Kioxia BiCS8 218-layer 3D TLC NAND
- Lower power draw than Phison E26 rivals
- 2.3 million random read IOPS rated
- Five-year warranty, 600 TBW on the 1 TB
- Discrete DRAM cache with NANDXtend ECC
- Cons
- No heatsink included on the bare SKU
- PCIe 5.0 wasted on PS5 and Gen4 boards
- 1 TB has the smallest SLC cache
- Modest real-world game gains over PCIe 4.0
- 8 TB capacity announced but not shipping
Buy this or similar SSD Storage:
Video Review
Destroying The Competition - WD Black SN8100 SSD Review
