Head-to-head · Best PCIe Gen5 NVMe SSDs

Seagate FireCuda 540 vs WD Black SN8100

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

WD Black SN8100 comes out ahead by a narrow margin (4.2 vs 4.5). The gap is mostly about Buyers who want the fastest, coolest-running Gen5 drive without a bulky heatsink — read the strengths below before deciding.

Ranked #4 in Best PCIe Gen5 NVMe SSDs

Seagate FireCuda 540

4.2

3 sources1 derived$399as of Aug 1

Instead of chasing peak speed like the rest of this group, the Seagate FireCuda 540 competes on durability and peace of mind. Tom's Hardware said the drive 'sets itself apart with an excellent warranty,' and its specification table puts the 2TB model at 2,000TB written on a five-year term with a three-year Seagate Rescue subscription — a service no rival here offers, and one the same review called 'an excellent addition that sets it apart from the MP700.' Peak speeds of around 10,000 MB/s trail the WD Black SN8100 and Crucial T705, but PCWorld found that 'though it's not the fastest PCIe 5.0 SSD we've seen with synthetic benchmarks, the FireCuda 540 blazed to a first-place finish in our real world 48GB transfers.' The drawbacks are familiar: it runs hot, needs a heatsink, and is priced like a flagship despite not being the fastest.

Strengths

— Class-leading endurance: rated up to 2,000 TBW on the 2TB model, well above the ~1,200 TBW of rival Gen5 drives
— Bundled three-year Seagate Rescue data-recovery service, unique in this group
— First-place finish in PCWorld's real-world 48GB transfer test despite lower peak synthetic numbers

Watch-outs

— Peak sequential speeds of ~10,000 MB/s trail the 14,000+ MB/s WD Black SN8100 and Crucial T705
— Bare drive throttles without a heatsink; needs motherboard or aftermarket M.2 cooling
— Poor power efficiency compared to the SM2508-based WD Black SN8100

$399 · Buy at newegg.com Full review →

Higher ratedRanked #2 in Best PCIe Gen5 NVMe SSDs

WD Black SN8100

4.5

3 sources1 derived$399.99as of Aug 1

Consumer PCIe 5.0 has a new performance benchmark in the WD Black SN8100, made by SanDisk. Tom's Hardware called it 'the fastest overall consumer SSD ever made,' and StorageReview measured it topping sequential charts at up to 15 GB/s reads and 14.1 GB/s writes, 'edging out even the Crucial T705 and Samsung 9100 Pro.' Efficiency is what sets it apart: the Silicon Motion SM2508 controller on a 6nm process draws far less power than the Phison E26 silicon in most rivals, so DongKnows (8.5/10) found it 'never became hotter than 85C, much less hot than the heatsink version of the Crucial T705.' Add record PCMark 10 scores and a 5-year, 1,200 TBW warranty and it is the most complete drive in this group. The catches are premium pricing and the need to supply your own cooling.

Strengths

— Fastest consumer SSD tested: up to 14,900 MB/s sequential reads and ~2.3M random read IOPS edge out the Crucial T705 and Samsung 9100 PRO
— Best-in-class power efficiency, drawing only 6.5W on reads, so it runs cooler than rival Phison E26 drives
— Silicon Motion SM2508 controller on a TSMC 6nm process avoids the heat problems that plague E26-based Gen5 SSDs

Watch-outs

— Premium flagship pricing, the only drawback Tom's Hardware listed against it
— Sold as a bare drive, so you still need motherboard or aftermarket M.2 cooling for sustained loads
— Gen5 speeds are overkill for gaming, where the gap over a good Gen4 drive is negligible

$399.99 · Check Price on Amazon Full review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

How they stack up

Seagate FireCuda 540

The Seagate FireCuda 540 is the endurance-and-safety pick of this group: its ~2,000 TBW rating on the 2TB model tops the ~1,200 TBW of the WD Black SN8100, Samsung 9100 PRO, and Crucial T705, and it is the only drive here with a bundled data-recovery service. It uses the same Phison controller as the Corsair MP700 Pro SE and Crucial T705, so it runs hot and trails the WD Black SN8100's efficiency, and its ~10,000 MB/s peak speeds are slower than every other drive in this lineup. Choose it over the faster WD Black SN8100 or Crucial T705 specifically when long-term endurance and the Rescue recovery service matter more than peak benchmarks.

WD Black SN8100

The WD Black SN8100 is the fastest drive in this group, beating the Crucial T705 and Samsung 9100 PRO in sequential throughput while drawing dramatically less power, so it runs cooler than the Corsair MP700 Pro SE and Crucial T705 without a fan. It uses a newer Silicon Motion controller, where the Corsair MP700 Pro SE, Crucial T705, and Seagate FireCuda 540 all share the same hotter Phison controller. It trades the Samsung 9100 PRO's 1GB-per-TB DRAM and Samsung's Magician ecosystem for higher peak speed and efficiency. Choose it over the Seagate FireCuda 540 if outright speed and thermals matter more than the FireCuda's data-recovery warranty.

Specs side-by-side

Spec	Seagate FireCuda 540	WD Black SN8100
Interface	PCIe 5.0 x4 (NVMe 2.0)	PCIe 5.0 x4 (NVMe 2.0)
Form Factor	M.2 2280	M.2 2280
NAND Type	Micron 232-layer TLC	SanDisk BiCS8 TLC 3D
Controller	Phison PS5026-E26	Silicon Motion SM2508 (6nm)
Sequential Read	Up to 10,000 MB/s	Up to 14,900 MB/s
Endurance	Up to 2,000 TBW (2TB)	—
Capacities	1TB, 2TB, 4TB	1TB, 2TB, 4TB
Warranty	5 years + 3-year Rescue service	5 years / 1,200 TBW (2TB)
Sequential Write	—	Up to 14,000 MB/s

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