Caldera SN-6491 Ultra 500GB PCIe 4.0 NVMe M.2 2280 SSD
SSDs · Caldera · SKU SN6491-ULTRA · Released 2020 · Updated 2026-10-20
Key facts
| Benchmark index | 4,887 (SSDs scale) |
|---|---|
| Category rank | #32,441 |
| Street price | $59 |
| Power | 5 W (active) |
| Performance per dollar | 82.83 |
| Released | 2020 |
Specifications
| Brand | Caldera |
|---|---|
| Model | Caldera SN-6491 Ultra |
| Capacity | 500 GB |
| Form factor | M.2 2280 |
| Interface | PCIe 4.0 x4, NVMe 2.0 |
| Sequential read | 7,200 MB/s |
| Sequential write | 5,100 MB/s |
| Random 4K read | 870K IOPS |
| NAND | 3D QLC, 176-layer |
| Cache | DRAM-less (HMB) |
| Endurance | 100 TBW (0.18 DWPD) |
| Warranty | 3 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
Similar SSDs
| Model | Benchmark | Price | Compare |
|---|---|---|---|
| Novexa SN-7824 Ti 2TB PCIe 4.0 NVMe M.2 2280 SSD | 7,802 | $169 | Compare |
| Caldera SN-2731 SE 4TB PCIe 4.0 NVMe M.2 2280 SSD | 12,485 | $439 | Compare |
| Strivon SN-2340 Max 8TB PCIe 4.0 NVMe M.2 2280 SSD | 14,619 | $479 | Compare |
| Caldera SN-2063 SE 2TB PCIe 4.0 NVMe M.2 2230 SSD | 7,069 | $119 | Compare |
| Altrix SN-3577 Ti 8TB PCIe 3.0 NVMe M.2 2280 SSD | 14,012 | $509 | Compare |
| Novexa SN-5454 Max 1TB PCIe 4.0 NVMe M.2 2280 SSD | 9,938 | $249 | Compare |
Cite this page: Hardware Spec Index, “Caldera SN-6491 Ultra 500GB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/3667979 (accessed 2026-10-20).