Capacity
WD BLACK SN7100 2TB2000 GB
Samsung 990 PRO 4TB4000 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 2TBPCIe 4.0 ×4 / NVMe
Samsung 990 PRO 4TBPCIe 4.0 ×4 / NVMe 2.0
DRAM cache
WD BLACK SN7100 2TB0 GB
Samsung 990 PRO 4TB4 GB
BLACK SN7100 2TB: 1 unknown fields · 990 PRO 4TB: 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 2TBWDS200T4X0E-00CJA0Remove | Samsung990 PRO 4TBMZ-V9P4T0BWRemove |
|---|---|---|
| Capacity | 2000 GB | 4000 GB |
| Interface | PCIe 4.0 ×4 / NVMe | PCIe 4.0 ×4 / NVMe 2.0 |
| Sequential read, up to | 7250 MB/s | 7450 MB/s |
| NAND type | TLC 3D NAND | TLC V-NAND |
| DRAM cache | 0 GB | 4 GB |
| Endurance | 1200 TBW | 2400 TBW |
| Controller | Unknown | Samsung in-house |
| Random read, up to | 1000000 IOPS | Unknown |
| Factory heatsink | No | Unknown |
| Drive height, up to | 2.38 mm | Unknown |
| Cache arrangement | DRAM-less | 4 GB DRAM |
| Shop offers | €325.00€162.50 / TB · confirmed delivered total | No verified offers yet |
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