Caldera SN-7581 Ultra 4TB PCIe 4.0 NVMe M.2 2280 SSD
SSDs · Caldera · SKU SN7581-ULTRA · Released 2020 · Updated 2026-10-21
Key facts
| Benchmark index | 10,222 (SSDs scale) |
|---|---|
| Category rank | #46,932 |
| Street price | $299 |
| Power | 8 W (active) |
| Performance per dollar | 34.19 |
| Released | 2020 |
Specifications
| Brand | Caldera |
|---|---|
| Model | Caldera SN-7581 Ultra |
| Capacity | 4 TB |
| Form factor | M.2 2280 |
| Interface | PCIe 4.0 x4, NVMe 2.0 |
| Sequential read | 6,400 MB/s |
| Sequential write | 6,100 MB/s |
| Random 4K read | 920K IOPS |
| NAND | 3D TLC, 176-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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| Model | Benchmark | Price | Compare |
|---|---|---|---|
| Mirenta SN-3028 XT 500GB SATA 2.5-inch SSD | 4,294 | $39 | Compare |
| Altrix SN-4021 Prime 1TB PCIe 4.0 NVMe M.2 2280 SSD | 5,323 | $69 | Compare |
| Altrix SN-8741 Ti 1TB SATA 2.5-inch SSD | 4,045 | $39 | Compare |
| Altrix SN-4647 XT 1TB PCIe 3.0 NVMe M.2 2280 SSD | 8,154 | $139 | Compare |
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Cite this page: Hardware Spec Index, “Caldera SN-7581 Ultra 4TB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/2395057 (accessed 2026-10-21).