Caldera SN-6521 Ultra 1TB PCIe 4.0 NVMe M.2 2280 SSD
SSDs · Caldera · SKU SN6521-ULTRA · Released 2022 · Updated 2026-10-19
Key facts
| Benchmark index | 6,953 (SSDs scale) |
|---|---|
| Category rank | #15,541 |
| Street price | $109 |
| Power | 6 W (active) |
| Performance per dollar | 63.79 |
| Released | 2022 |
Specifications
| Brand | Caldera |
|---|---|
| Model | Caldera SN-6521 Ultra |
| Capacity | 1 TB |
| Form factor | M.2 2280 |
| Interface | PCIe 4.0 x4, NVMe 2.0 |
| Sequential read | 7,400 MB/s |
| Sequential write | 6,400 MB/s |
| Random 4K read | 920K IOPS |
| NAND | 3D TLC, 218-layer |
| Cache | DRAM-less (HMB) |
| Endurance | 600 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
Similar SSDs
| Model | Benchmark | Price | Compare |
|---|---|---|---|
| Novexa SN-4380 Pro 8TB PCIe 5.0 NVMe M.2 2280 SSD | 11,768 | $319 | Compare |
| Caldera SN-4855 Ti 1TB PCIe 4.0 NVMe M.2 2280 SSD | 6,646 | $109 | Compare |
| Novexa SN-9195 SE 4TB PCIe 4.0 NVMe M.2 2280 SSD | 12,928 | $489 | Compare |
| Novexa SN-4213 Plus 8TB PCIe 4.0 NVMe M.2 2280 SSD | 12,829 | $439 | Compare |
| Caldera SN-9238 Ti 4TB PCIe 4.0 NVMe M.2 2280 SSD | 10,343 | $249 | Compare |
| Caldera SN-2798 SE 8TB PCIe 5.0 NVMe M.2 2280 SSD | 14,439 | $549 | Compare |
Cite this page: Hardware Spec Index, “Caldera SN-6521 Ultra 1TB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/21391875 (accessed 2026-10-19).