Head to head
Samsung 990 PRO 4TB vs Western Digital WD Black SN7100 2 TB
Our pick
Western Digital WD Black SN7100 2 TB
M.2 NVMe SSDs
Product photographs. Not to scale.
What Samsung 990 PRO 4TB offers
Choose the Samsung 990 PRO 4TB when the working library needs 4TB. It has a five-year warranty and 2,400 TB endurance rating, giving twice the capacity and rated write allowance of the 2TB SN7100.123
2 models / at a glance
Key differences
What differs
| Specification | Samsung 990 PRO 4TB | Western Digital WD Black SN7100 2 TB |
|---|---|---|
| Capacity | 4,000 GB3 | 2,000 GB1 |
| Endurance | 2,400 TB3 | 1,200 TB2 |
| DRAM cache | Yes4 | No1 |
More details
| Specification | Samsung 990 PRO 4TB | Western Digital WD Black SN7100 2 TB |
|---|---|---|
| PCIe generation | Gen43 | Gen41 |
| Sequential read speed | 7,450 MB/s (Test method: IOmeter1.1.0)4 | 7,250 MB/s1 |
| Sequential write speed | 6,900 MB/s (Test method: IOmeter1.1.0; Workload: Intelligent TurboWrite technology being activated)4 | 6,900 MB/s1 |
| Flash cell type | Tlc3 | Tlc1 |
| Random read | 1,600,000 IOPS (Test method: IOmeter1.1.0; Workload: QD 32 Thread 16)4 | 1,000,000 IOPS1 |
| Warranty | 5 years3 | 5 years1 |
| Hardware encryption | Yes4 | Not published |
| M.2 form factor | M.2 (2280)4 | M.2 22801 |