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SSD comparison · Updated May 14, 2026

Samsung 990 PRO 1TB vs WD_BLACK SN7100 2TB

Samsung 990 PRO 1TB ($135) vs WD_BLACK SN7100 2TB ($165). $/TB analysis, performance, and use-case recommendations.

Samsung 990 PRO 1TB Gen 4

Samsung · Samsung Pascal
$135
$135.00/TB
View on Amazon →

WD_BLACK SN7100 2TB Gen 4

WD · SanDisk A101
$165
$82.50/TB
View on Amazon →
Generation
Gen 4
Gen 4
Price (USD)
$135
$165
Capacity
1 TB
2 TB
$/TB
$135.00
$82.50
Sequential read
7,450 MB/s
7,250 MB/s
Sequential write
6,900 MB/s
6,900 MB/s
Interface
PCIe 4.0 x4
PCIe 4.0 x4
Controller
Samsung Pascal
SanDisk A101
DRAM cache
Yes
No (HMB)
TBW endurance
600 TBW
1,200 TBW
Warranty
5 years
5 years
PS5 compatible
Yes
Yes

Verdict: Samsung 990 PRO 1TB vs WD_BLACK SN7100 2TB

Both run on Gen 4 hardware but at different capacities: 1 TB for the Samsung 990 PRO 1TB versus 2 TB for the WD_BLACK SN7100 2TB. Whether the larger drive's $/TB advantage justifies the higher upfront cost depends on how much you actually need.

Hardware-wise, the Samsung 990 PRO 1TB runs on the in-house Samsung Pascal — engineered specifically for the 990 PRO at 8nm. The WD_BLACK SN7100 2TB pairs an A101 controller that replaced the older WD designs in the SN7100 generation.

The cost difference is hard to ignore: 39% per TB (WD_BLACK SN7100 2TB at $82.50/TB versus Samsung 990 PRO 1TB at $135.00/TB). Unless you specifically need the Samsung 990 PRO 1TB's peak performance, the WD_BLACK SN7100 2TB delivers more storage for the money.

Cache architecture differs: Samsung 990 PRO 1TB has DRAM hardware, WD_BLACK SN7100 2TB uses HMB. For OS, gaming, browsing — indistinguishable. For databases, large file ops, or 4K video editing — DRAM has a small but consistent edge.

WD_BLACK SN7100 2TB earns higher TBW ratings (1,200 vs 600 TBW) — relevant for sustained write workloads, irrelevant for everything else.

Real-world use cases

For PS5 expansion, both are PCIe Gen 4 M.2 2280 drives that meet Sony's minimum spec (7,250 MB/s read). The console can't take advantage of speeds beyond that, so save money by choosing the WD_BLACK SN7100 2TB. Note for handheld gamers: M.2 2280 is the desktop/laptop standard. Steam Deck and the ROG Ally line need 2230 drives — neither Samsung 990 PRO 1TB nor WD_BLACK SN7100 2TB fits without modification.

Pick the Samsung 990 PRO 1TB if...

The Samsung 990 PRO 1TB is the right call if the lower retail price ($135 vs $165), and a dedicated DRAM cache chip matter to you. Among consumer SSD makers, Samsung's PRO series consistently scores highest on long-term reliability surveys (Backblaze, Puget Systems Q1 2026 data).

Pick the WD_BLACK SN7100 2TB if...

The WD_BLACK SN7100 2TB is the right call if better $/TB economics ($82.50/TB), and a higher TBW endurance rating (1,200 TBW) matter to you.

Best value for money

WD_BLACK SN7100 2TB
$82.50/TB beats the alternative by 39%

Best for gaming

WD_BLACK SN7100 2TB
Strong $/MB-s ratio for game loads, and fits the PS5 expansion slot

Best for content creators

Samsung 990 PRO 1TB
Best write-heavy profile here: 6,900 MB/s sustained, 600 TBW

Best for PS5

WD_BLACK SN7100 2TB
PS5-compatible Gen 4 at $82.50/TB
FAQ

Samsung 990 PRO 1TB vs WD_BLACK SN7100 2TB — common questions

What's the price difference between Samsung 990 PRO 1TB and WD_BLACK SN7100 2TB?

The WD_BLACK SN7100 2TB costs $165 (82.50 per TB), while the Samsung 990 PRO 1TB runs $135 (135.00 per TB). The gap is $30, equivalent to about 39% per TB. Prices change weekly; check current Amazon listings before deciding.

Does the Samsung 990 PRO 1TB's read advantage matter in practice?

Specs say yes (7,450 MB/s versus 7,250 MB/s). Real-world testing says rarely. Game load times and OS boots saturate well below either drive's peak read speed. The advantage shows up in sustained sequential reads — large file copies, raw video reads, dataset loads.

Will the Samsung 990 PRO 1TB or WD_BLACK SN7100 2TB work in my PlayStation 5?

Yes to both — both meet Sony's expansion specs (PCIe Gen 4 NVMe, M.2 2280, with a heatsink). The PS5 won't differentiate between them in benchmarks because its internal storage controller throttles to PCIe Gen 4 speeds. WD_BLACK SN7100 2TB wins this matchup if price is your tiebreaker.

Does the Samsung 990 PRO 1TB's DRAM cache make a noticeable difference?

For OS, gaming, and general productivity: no. The WD_BLACK SN7100 2TB's HMB (Host Memory Buffer) implementation matches DRAM performance within 5% on these workloads. DRAM matters for sustained random writes — databases, multi-GB file operations, video editing project saves. Heavy daily writers see the difference; casual users do not.

How much does the 600 TBW endurance gap actually matter?

For most buyers, it doesn't. The WD_BLACK SN7100 2TB's 1,200 TBW versus the Samsung 990 PRO 1TB's 600 TBW translates to years of additional theoretical lifetime, but consumer drives almost always die from controller failure or firmware issues long before reaching TBW limits.

Bottom line: Samsung 990 PRO 1TB or WD_BLACK SN7100 2TB?

Default recommendation: WD_BLACK SN7100 2TB. It hits the right balance of price ($82.50/TB), Gen 4 performance, and brand support for the average buyer. The Samsung 990 PRO 1TB has its place if you need faster sequential reads, but that's a narrower use case.

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