Capacity
WD BLACK SN7100 4TB4000 GB
Samsung 990 PRO 2TB2000 GB
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What changes?
The differences at a glance
Manufacturer facts for these exact variants. The order does not declare a performance winner.
Interface
WD BLACK SN7100 4TBPCIe 4.0 ×4 / NVMe
Samsung 990 PRO 2TBPCIe 4.0 ×4 / NVMe 2.0
DRAM cache
WD BLACK SN7100 4TB0 GB
Samsung 990 PRO 2TB2 GB
BLACK SN7100 4TB: 1 unknown fields · 990 PRO 2TB: 3 unknown fields. Unknown does not mean absent.
Compare capacity and cache, not just peak speed
Manufacturer speeds are maxima under stated test conditions. They do not show sustained writing after the cache fills. TBW is a write-endurance warranty limit, not a predicted failure date; time limits also apply. Check M.2 length, interface and heatsink clearance in the host manual. Price per TB uses nominal decimal capacity and a confirmed delivered total.
| Specifications | WDBLACK SN7100 4TBWDS400T4X0E-00CJA0Remove | Samsung990 PRO 2TBMZ-V9P2T0BWRemove |
|---|---|---|
| Capacity | 4000 GB | 2000 GB |
| Interface | PCIe 4.0 ×4 / NVMe | PCIe 4.0 ×4 / NVMe 2.0 |
| Sequential read, up to | 7000 MB/s | 7450 MB/s |
| Sequential write, up to | 6700 MB/s | 6900 MB/s |
| NAND type | TLC 3D NAND | TLC V-NAND |
| DRAM cache | 0 GB | 2 GB |
| Endurance | 2400 TBW | 1200 TBW |
| Controller | Unknown | Samsung in-house |
| Random read, up to | 900000 IOPS | Unknown |
| Factory heatsink | No | Unknown |
| Drive height, up to | 2.38 mm | Unknown |
| Cache arrangement | DRAM-less | 2 GB DRAM |
| Shop offers | €549.00€137.25 / TB · confirmed delivered total | No verified offers yet |
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