Choosing between the Samsung 990 EVO Plus 2TB NVMe SSD (MZ-V9S2T0B/AM) and the WD_BLACK SN7100 2TB NVMe SSD (WDS200T4X0E) is a DRAM-less PCIe Gen4 fork at 2TB. Both quote about 7,250 MB/s sequential read on paper. Samsung leans on Magician, nickel-coated controller efficiency, and a PCIe 4.0 x4 / 5.0 x2 interface claim. WD leans on higher claimed write speed, laptop and handheld power-efficiency marketing, and a lower recent street price. Specs and prices below come from maker sheets and current Amazon listings, not a lab shootout.
This head-to-head sits beside OWC Express 1M2 Review for USB4 enclosure duty, Best M.2 NVMe Enclosures, USB4 vs Thunderbolt Pocket SSDs, and Best USB4 M.2 Enclosures Under $100. For the connector vocabulary, see NVMe. For stretching an older laptop first, see Make a 4-Year-Old Laptop Last Three More Years.
| Attribute | Samsung 990 EVO Plus 2TB NVMe SSD (MZ-V9S2T0B/AM) | WD_BLACK SN7100 2TB NVMe SSD (WDS200T4X0E) |
|---|---|---|
| Rating | 4.8 | 4.8 |
| Price | $369.99approx. · checked Sep 2026 | $319.99approx. · checked Sep 2026 |
| Capacity | 2TB | 2TB |
| Model | MZ-V9S2T0B/AM | WDS200T4X0E |
| Interface | PCIe 4.0 x4 / 5.0 x2 NVMe, M.2 2280 | PCIe Gen4 x4 NVMe, M.2 2280 |
| Sequential read | up to 7,250 MB/s | up to 7,250 MB/s |
| Sequential write | up to 6,300 MB/s | up to 6,900 MB/s |
| NAND / cache | Samsung TLC V-NAND, DRAM-less (HMB) | TLC 3D NAND, DRAM-less (HMB) |
| Endurance | 1,200 TBW (2TB) | 1,200 TBW class (2TB) |
| Warranty | 5-year limited manufacturer | 5-year limited (maker marketing; confirm listing) |
| Buy | View on Amazon | View on Amazon |
Quick verdict
Most people should buy the WD_BLACK SN7100 2TB. Maker claims put sequential read at 7,250 MB/s and write at 6,900 MB/s, with power-efficiency messaging aimed at laptops and handhelds, at a recent Amazon street price near $319.99. The Samsung 990 EVO Plus 2TB matches the 7,250 MB/s read claim with 6,300 MB/s write, adds Magician tooling and a PCIe 4.0 x4 / 5.0 x2 interface story, and recently sat near $369.99. Specs are close enough that the cheaper stick wins for most upgrades unless you specifically want Samsung software and brand habits.
Price and value
Winner: WD_BLACK SN7100. Recent Amazon anchors put the SN7100 2TB near $319.99 (marketplace sellers also appear) and the 990 EVO Plus 2TB near $369.99. For a DRAM-less Gen4 boot or games drive, about $50 less for similar read claims is the clearer dollars story. Pay the Samsung premium when Magician, Samsung SED/Opal-class marketing, or staying inside a Samsung spare-drive habit matters more than the gap.
Sequential speed and interface
Winner: WD_BLACK SN7100 on claimed write; Samsung on Gen5 x2 option. Both quote up to 7,250 MB/s sequential read. WD claims up to 6,900 MB/s write on 1TB to 2TB models. Samsung claims up to 6,300 MB/s write with Intelligent TurboWrite 2.0 caveats. Samsung also documents PCIe 4.0 x4 and 5.0 x2 compatibility, which can matter on a board that exposes a Gen5 x2 path. On a normal Gen4 laptop or mini PC slot, real-world transfers are usually close enough that price and software decide the buy. For external pocket use after you put the stick in a shell, see USB4 vs Thunderbolt Pocket SSDs and OWC Express 1M2 Review.
| Axis | Samsung 990 EVO Plus 2TB | WD_BLACK SN7100 2TB |
|---|---|---|
| Capacity | 2TB (MZ-V9S2T0B/AM) | 2TB (WDS200T4X0E) |
| Interface | PCIe 4.0 x4 / 5.0 x2 NVMe, M.2 2280 | PCIe Gen4 x4 NVMe, M.2 2280 |
| Seq. read (claim) | up to 7,250 MB/s | up to 7,250 MB/s |
| Seq. write (claim) | up to 6,300 MB/s | up to 6,900 MB/s |
| Cache design | DRAM-less (HMB) | DRAM-less (HMB) |
| Endurance (maker class) | 1,200 TBW (2TB class) | 1,200 TBW class (scales with capacity) |
| Software | Samsung Magician | WD_BLACK Dashboard (Windows) |
| Typical street price | ~$370 | ~$320 |
| Best fit | Samsung ecosystem / Magician buyers | Value Gen4 laptop and enclosure stick |
Thermals, power, and form factor
Winner: roughly tied; slight edge to WD for laptop and handheld marketing. Both are single-sided M.2 2280 sticks without a bundled heatsink. Samsung highlights a nickel-coated controller and efficiency messaging. WD markets up to 100% better power efficiency versus its prior generation for laptops and handhelds. In a desktop with a motherboard heatsink either is fine. In a thin laptop, mini PC, or USB4 enclosure, confirm height clearance and expect HMB behavior on long sustained writes. For quiet under-desk storage that is not a bare stick, see Best DAS RAID Enclosures and Best M.2 NVMe Enclosures.
Software and features
Winner: Samsung 990 EVO Plus for Magician polish; WD for a simple Dashboard path. Samsung Magician covers health, firmware, and over-provisioning habits many Samsung buyers already know. WD_BLACK Dashboard is Windows-oriented optimization and monitoring. Neither replaces a proper clone tool when you migrate an OS (Macrium, Clonezilla, vendor clone utilities, or the laptop maker's restore path). If you already live in Magician across several Samsung drives, staying Samsung reduces tooling churn.
Who should buy which
Buy the WD_BLACK SN7100 2TB if you want a Gen4 2TB stick for a laptop, mini PC, or enclosure at the lower recent street price and do not need Samsung Magician specifically.
Buy the Samsung 990 EVO Plus 2TB if Magician, Samsung spare-drive habits, or the PCIe 5.0 x2 forward-compat claim are worth about $50 more than the SN7100.
Skip both if you need a DRAM-cached Pro-class drive for heavy sustained write workloads, or you actually need a finished pocket SSD instead of a bare M.2 stick (buy an enclosure kit or a prebuilt USB4/TB SSD instead).
Bottom line
Samsung 990 EVO Plus 2TB and WD_BLACK SN7100 2TB are close DRAM-less Gen4 peers. The SN7100 is the overall pick for most buyers on street price with matching read claims and a higher write claim. The 990 EVO Plus is the pick when Magician and Samsung ecosystem habits win. Specs here are from maker sheets and Amazon listings, not a lab shootout. Confirm current street pricing, then View on Amazon for the SN7100 or the 990 EVO Plus before you order.
For putting either stick in a shell, see Best M.2 NVMe Enclosures and OWC Express 1M2 Review. For NVMe basics, see NVMe.
