Interface
WD BLACK SN8100 2TBPCIe 5.0 ×4 / NVMe 2.0
Samsung 990 PRO 2TBPCIe 4.0 ×4 / NVMe 2.0
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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.
DRAM cache
WD BLACK SN8100 2TBUnknown
Samsung 990 PRO 2TB2 GB
Cache arrangement
WD BLACK SN8100 2TBDRAM present; capacity not specified
Samsung 990 PRO 2TB2 GB DRAM
BLACK SN8100 2TB: 2 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 SN8100 2TBWDS200T1X0M-00CMT0Remove | Samsung990 PRO 2TBMZ-V9P2T0BWRemove |
|---|---|---|
| Interface | PCIe 5.0 ×4 / NVMe 2.0 | PCIe 4.0 ×4 / NVMe 2.0 |
| Sequential read, up to | 14900 MB/s | 7450 MB/s |
| Sequential write, up to | 14000 MB/s | 6900 MB/s |
| NAND type | TLC 3D CBA NAND | TLC V-NAND |
| DRAM cache | Unknown | 2 GB |
| Controller | Unknown | Samsung in-house |
| Random read, up to | 2300000 IOPS | Unknown |
| Factory heatsink | No | Unknown |
| Drive height, up to | 2.38 mm | Unknown |
| Cache arrangement | DRAM present; capacity not specified | 2 GB DRAM |
| Shop offers | No verified offers yet | No verified offers yet |
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