Altrix SN-7921 XT 4TB PCIe 4.0 NVMe M.2 2280 SSD
SSDs · Altrix · SKU SN7921-XT · Released 2021 · Updated 2026-10-24
Key facts
| Benchmark index | 10,924 (SSDs scale) |
|---|---|
| Category rank | #47,270 |
| Street price | $279 |
| Power | 5 W (active) |
| Performance per dollar | 39.15 |
| Released | 2021 |
Specifications
| Brand | Altrix |
|---|---|
| Model | Altrix SN-7921 XT |
| Capacity | 4 TB |
| Form factor | M.2 2280 |
| Interface | PCIe 4.0 x4, NVMe 2.0 |
| Sequential read | 4,900 MB/s |
| Sequential write | 4,200 MB/s |
| Random 4K read | 1,080K IOPS |
| NAND | 3D TLC, 238-layer |
| Cache | DDR4 DRAM, 4 GB |
| Endurance | 2,400 TBW (0.33 DWPD) |
| Warranty | 5 years |
| Heatsink | None |
Related guides
NVMe SSDs ExplainedM.2 SSD Sizes and KeysSSD Endurance ExplainedDRAM vs DRAM-less SSDsPCIe 4.0 vs PCIe 5.0
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Cite this page: Hardware Spec Index, “Altrix SN-7921 XT 4TB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/4591697 (accessed 2026-10-24).