Caldera SN-1639 Ultra 1TB PCIe 4.0 NVMe M.2 2280 SSD
SSDs · Caldera · SKU SN1639-ULTRA · Released 2021 · Updated 2026-10-20
Key facts
| Benchmark index | 4,680 (SSDs scale) |
|---|---|
| Category rank | #3,461 |
| Street price | $49 |
| Power | 7 W (active) |
| Performance per dollar | 95.51 |
| Released | 2021 |
Specifications
| Brand | Caldera |
|---|---|
| Model | Caldera SN-1639 Ultra |
| Capacity | 1 TB |
| Form factor | M.2 2280 |
| Interface | PCIe 4.0 x4, NVMe 2.0 |
| Sequential read | 6,400 MB/s |
| Sequential write | 4,900 MB/s |
| Random 4K read | 870K IOPS |
| NAND | 3D TLC, 238-layer |
| Cache | DRAM-less (HMB) |
| Endurance | 600 TBW (0.55 DWPD) |
| Warranty | 3 years |
| Heatsink | Heatsink edition available |
Related guides
NVMe SSDs ExplainedM.2 SSD Sizes and KeysSSD Endurance ExplainedDRAM vs DRAM-less SSDsPCIe 4.0 vs PCIe 5.0
Similar SSDs
| Model | Benchmark | Price | Compare |
|---|---|---|---|
| Mirenta SN-7942 Prime 1TB SATA 2.5-inch SSD | 4,585 | $49 | Compare |
| Novexa SN-2855 Ultra 8TB PCIe 4.0 NVMe M.2 2280 SSD | 14,900 | $519 | Compare |
| Strivon SN-7939 Pro 2TB PCIe 3.0 NVMe M.2 2280 SSD | 11,964 | $319 | Compare |
| Caldera SN-7493 Core 2TB PCIe 4.0 NVMe M.2 2280 SSD | 11,207 | $329 | Compare |
| Mirenta SN-3002 Prime 4TB PCIe 4.0 NVMe M.2 2280 SSD | 10,051 | $309 | Compare |
| Novexa SN-1094 Ultra 1TB SATA 2.5-inch SSD | 3,325 | $29 | Compare |
Cite this page: Hardware Spec Index, “Caldera SN-1639 Ultra 1TB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/767224 (accessed 2026-10-20).