Western Digital SN8100 8 TB: WD's Top-Capacity Gen5 Drive (2026)

Name: WESTERN DIGITAL SN8100 8 TB
Brand: WESTERN DIGITAL
SKU: western-digital-sn8100-8-tb
Rating: 3.6 (21 reviews)

Posted on July 13, 2026 by Raymond Chen

The Western Digital SN8100 8 TB tops WD's PCIe 5.0 flagship family, announced for late 2026 and rated at 4,800 TBW, the lineup's highest endurance, though not yet shipping or independently reviewed.

Western Digital SN8100 8 TB: WD's Top-Capacity Gen5 Drive

Controller & Memory

The Western Digital SN8100 8 TB is the largest announced capacity of WD's first PCIe 5.0 flagship family, and it pushes consumer Gen5 storage into territory very few drives occupy. WD disclosed the 8 TB SKU alongside the shipping 1 TB, 2 TB, and 4 TB models, but at research time the 8 TB had not yet reached retail, so every figure here is a manufacturer rating rather than a measured result. Internally the SN8100 platform pairs a Silicon Motion SM2508 eight-channel controller built on TSMC's 6 nm process with Kioxia BiCS8 218-layer 3D TLC NAND running at 3,600 MT/s, a discrete DRAM cache, SanDisk's nCache 4.0 pseudo-SLC layer, and Silicon Motion's NANDXtend ECC. WD rates every SN8100 capacity identically for peak throughput, 14,900 MB/s sequential reads, 14,000 MB/s writes, 2.3 million random read IOPS, and 2.4 million random write IOPS over a PCIe 5.0 x4 link, so on paper the 8 TB matches the 1 TB; only endurance scales, at 600 TBW per terabyte.

At 8 TB the endurance rating lands at 4,800 TBW (4.8 PBW), the highest in the family and a figure that dwarfs the 600 TBW of the 1 TB and the 1,200 TBW of the reviewed 2 TB. That cushion repositions the drive: where the smaller capacities serve gamers and general enthusiasts, the 8 TB targets bulk-storage buyers, media libraries, large VM and container images, photography and video archives, and prosumer workstations that want one fast volume instead of a SATA SSD plus a spinning disk. Consumer 8 TB M.2 NVMe at Gen5 speeds is genuinely rare; most rivals cap at 4 TB, so the SN8100 8 TB's nearest competition on capacity alone is enterprise-adjacent U.2 or QLC hardware rather than another TLC Gen5 drive. The trade-off is that an 8 TB module is dense, and stacked NAND plus a hot SM2508 controller make motherboard heatsink coverage close to mandatory.

On the shelf, the SN8100 family's closest platform sibling is the Kingston Fury Renegade G5 on the same SM2508 silicon, while the Phison E26 tier, the Crucial T705 and Seagate FireCuda 540, tops out at 4 TB, leaving the 8 TB without a like-for-like Gen5 rival. Buyers who need 8 TB sooner can look to QLC alternatives such as the Corsair MP600 PRO XT, which trade sustained write speed for capacity. Until the SN8100 8 TB ships and independent reviewers can measure its real sustained-write curve, thermals, and power draw, the honest read is a class-leading capacity on a proven controller, with the buyer-facing verdict still pending on shipping silicon.

Storage Comparisons:

Best PCIe 5.0 SSD Best Deal of 1 TB SSDs NVME Top 2 TB SSDs

SN8100 Performance & Benchmarks

Every performance figure for the Western Digital SN8100 8 TB is a manufacturer rating, not an independent measurement, because no 8 TB review unit has shipped at research time. WD rates the 8 TB at 14,900 MB/s sequential reads, 14,000 MB/s sequential writes, 2.3 million random read IOPS, and 2.4 million random write IOPS over a PCIe 5.0 x4 link, identical to the 1 TB, 2 TB, and 4 TB on paper. Those numbers essentially saturate the Gen5 ceiling, and they match what independent reviewers measured on the shipping 2 TB, the strongest available evidence that the platform delivers its rated claims. Tom's Hardware, TechPowerUp, StorageReview, and TweakTown all title the 2 TB as the fastest consumer SSD they have tested, with TweakTown framing its random-access latency as approaching Optane.

Performance comparison

WESTERN DIGITAL SN8100 8 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 8 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 8 TB's real upside is prospective and capacity-driven. Because the SLC cache scales with NAND capacity, an 8 TB module should hold its burst write speed over a far larger window than the 2 TB, which TechPowerUp measured holding 8 GB/s until roughly 623 GB filled before settling to about 4 GB/s direct-to-TLC and averaging 2.5 GB/s across a full-capacity fill. Proportionally, the 8 TB's cache could absorb multiple terabytes at burst speed before the same drop-off, ideal for bulk video ingests, large database clones, or VM image transfers, but that curve is projected from the 2 TB's measured behaviour, not yet confirmed on an 8 TB unit. The SM2508 controller's efficiency advantage over Phison's E26, documented at 6.5 W read and 7.0 W write on the smaller capacities, should carry over, though an 8 TB module's higher NAND density may shift thermals. Until a review sample ships, treat the 14,900 MB/s and 2.4 million IOPS as WD's target, and the sustained-write behaviour as an informed projection from the proven 2 TB.

WESTERN DIGITAL SN8100 vs Competitors

See how the SN8100 stacks up against other M.2 5.0 drives in our database:

Compare with rival drives:

ADATA Mars 970 Storm 8 TB

Endurance, TBW & Warranty

WD covers the SN8100 family with a five-year limited warranty, and the 8 TB carries the lineup's largest endurance rating at 4,800 TBW (4.8 PBW), scaling directly from the 600 TBW-per-terabyte formula shared across the 1 TB, 2 TB, and 4 TB models. The warranty ends early only if that 4,800 TBW ceiling is exceeded, whichever comes first. At a typical consumer write workload of around 20 GB per day, the 8 TB would need more than 650 years to exhaust the NAND, so in practice the five-year term expires long before the flash does; even a heavy 100 GB-per-day prosumer routine still clears 130 years. WD rates the drive at up to two million hours MTBF, a population-reliability statistic describing expected failures across a large fleet rather than a lifespan guarantee for any single unit. Because the 8 TB has not yet shipped, the 4,800 TBW figure remains a manufacturer rating rather than an independently verified result.

WESTERN DIGITAL SN8100 8 TB Specifications

Category	Value
Capacity [?]	8 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) [?]	4800
MTBF (million hours) [?]	2000000
Warranty (years) [?]	5

Verdict: Is the SN8100 Worth It in 2026?

The Western Digital SN8100 8 TB is the right drive to wait for when the use case is a single fast 8 TB volume, a media archive, a VM and container library, or a prosumer workstation that wants Gen5 bandwidth without sacrificing capacity, since its 4,800 TBW and rated 14,900 MB/s reads would be class-leading on paper. Skip it for a pure gaming build, where the smaller 2 TB or 4 TB SN8100 delivers identical peak speeds at a far lower price, and skip it on a PCIe 4.0 board or a PlayStation 5, whose slot cannot use the Gen5 bandwidth. The closest alternative today is WD's own 4 TB SN8100 for buyers who need shipping hardware now, or a QLC 8 TB like the Corsair MP600 PRO XT for capacity-first storage at lower speed. The verdict: WD has announced the highest-capacity, highest-endurance consumer Gen5 SSD on a proven SM2508 platform, and the real test begins the day review samples ship.

+ Pros

14,900 MB/s rated sequential reads over PCIe 5.0
4,800 TBW endurance, highest in the SN8100 family
Silicon Motion SM2508 6 nm Gen5 controller
Kioxia BiCS8 218-layer 3D TLC NAND
Five-year limited warranty
8 TB capacity is rare among TLC Gen5 drives
2.4 million rated random write IOPS

- Cons

Announced but not yet shipping at research time
No independent 8 TB reviews exist yet
No like-for-like 8 TB Gen5 rival to compare
No included heatsink on the bare SKU
PCIe 5.0 wasted on PS5 and Gen4 boards
Dense 8 TB module runs hot under sustained writes

3.6 / 5 · 21 votes

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Video Review

We Were Not Expecting This! | WD_BLACK SN8100 Review

Frequently Asked Questions

At research time the Western Digital SN8100 8 TB is announced but not yet shipping. WD disclosed the 8 TB SKU alongside the 1 TB, 2 TB, and 4 TB models, and the smaller capacities are already on retail shelves and widely reviewed, while TechPowerUp notes the 8 TB is coming later in 2026. That means every published spec, the 14,900 MB/s reads, 2.4 million write IOPS, and 4,800 TBW endurance, is a manufacturer rating rather than an independently measured result. Until review samples reach outlets like Tom's Hardware, StorageReview, and TechPowerUp, treat the performance and endurance figures as WD's target, and watch for a firm retail launch date before planning a build around the 8 TB.

The Western Digital SN8100 8 TB carries a 4,800 TBW endurance rating, the highest in the SN8100 family and equivalent to 4.8 PBW. The figure scales directly from the 600 TBW-per-terabyte formula WD applies across the whole lineup: 600 TBW on the 1 TB, 1,200 TBW on the reviewed 2 TB, 2,400 TBW on the 4 TB, and 4,800 TBW on the 8 TB. At a typical consumer workload of around 20 GB of writes per day, the 8 TB would need more than 650 years to exhaust the NAND, so the five-year warranty expires long before the flash does. The 4,800 TBW figure is published by WD and listed on johnnylucky.org; it awaits independent confirmation once the drive ships.

The WD SN8100 8 TB uses Silicon Motion's SM2508 eight-channel PCIe 5.0 NVMe controller, built on TSMC's 6 nm process and paired with Kioxia BiCS8 218-layer 3D TLC NAND at 3,600 MT/s, a discrete DRAM cache, SanDisk's nCache 4.0 pseudo-SLC layer, and Silicon Motion's NANDXtend ECC. SanDisk rebrands the part as A101-250800-AC on the SN8100. The SM2508 is the platform's real differentiator: where earlier Gen5 flagships like the Crucial T705 and Seagate FireCuda 540 rely on Phison's PS5026-E26, the SM2508 is tuned for efficiency, and independent reviews of the 2 TB flag its lower power draw, 6.5 W reads and 7.0 W writes, and lower thermals as its core advantage. The Kingston Fury Renegade G5 shares the same silicon.

On paper the SN8100 8 TB is overkill for pure gaming, since its rated 14,900 MB/s reads and 2.3 million random read IOPS match the smaller SN8100 capacities that independent reviewers already call the fastest consumer SSDs they have tested. In practice, game load times are usually bounded by the CPU and asset decompression, so a PCIe 4.0 drive like the Samsung 990 Pro or WD Black SN850X feels near-identical in most current titles, and an 8 TB Gen5 drive is more capacity than a game library needs. The real value is a single huge fast volume for a rig that also handles video editing, VM hosting, or DirectStorage-enabled titles that stream large textures straight from the SSD. For gaming alone, the 2 TB or 4 TB SN8100 is the saner buy.

Technically it should, once it ships, but it is a poor fit for a PlayStation 5. Sony requires an M.2 NVMe SSD recommending at least 5,500 MB/s sequential reads and fitting within 110 by 25 by 11.25 millimetres with a heatsink, and the SN8100 8 TB clears the speed bar easily. The problem is that the PS5 expansion slot is PCIe 4.0, so this Gen5 drive runs at roughly half its rated speed and the PCIe 5.0 hardware is wasted. A PCIe 4.0 drive like the Samsung 990 Pro or WD Black SN850X delivers the same PS5 performance at lower cost, and an 8 TB module's dense PCB and thick heatsink may also strain the console's height clearance. Save the SN8100 8 TB for a desktop Gen5 build.

It does need active cooling, and the base SN8100 ships without a heatsink in the box. The Silicon Motion SM2508 controller runs cooler than Phison's E26, but sustained Gen5 writes still push the silicon hard enough that a bare drive in a cramped slot can throttle, dropping sequential writes below the rated 14,000 MB/s. On an 8 TB module the problem is sharper, since stacked NAND and a dense PCB raise ambient heat around the controller. Most PCIe 5.0 motherboards ship with a built-in M.2 heatsink that handles this, and WD also sells a factory heatsink variant of the SN8100 with an anodized aluminum block, dual thermal pads, and RGB lighting for builders without motherboard coverage. Avoid running any Gen5 drive bare and passive.

The two share identical peak ratings, 14,900 MB/s reads, 14,000 MB/s writes, 2.3 million read IOPS, and 2.4 million write IOPS over PCIe 5.0 x4, because WD uses the same Silicon Motion SM2508 controller and Kioxia BiCS8 TLC across the whole SN8100 family. The real differences are capacity, endurance, and availability: the 4 TB carries a 2,400 TBW rating and is already shipping and independently reviewed, while the 8 TB doubles endurance to 4,800 TBW but is still announced rather than on retail shelves. The 8 TB also likely uses a double-sided PCB where the 4 TB can be single-sided, which affects slot fit in some laptops and small-form-factor builds. Buy the 4 TB for proven shipping hardware today; wait for the 8 TB only when the extra capacity and endurance genuinely matter.