Caldera SN-6556 Ultra 2TB PCIe 4.0 NVMe M.2 2280 SSD
SSDs · Caldera · SKU SN6556-ULTRA · Released 2021 · Updated 2026-10-26
Key facts
| Benchmark index | 10,602 (SSDs scale) |
|---|---|
| Category rank | #38,977 |
| Street price | $269 |
| Power | 8 W (active) |
| Performance per dollar | 39.41 |
| Released | 2021 |
Specifications
| Brand | Caldera |
|---|---|
| Model | Caldera SN-6556 Ultra |
| Capacity | 2 TB |
| Form factor | M.2 2280 |
| Interface | PCIe 4.0 x4, NVMe 2.0 |
| Sequential read | 6,600 MB/s |
| Sequential write | 6,100 MB/s |
| Random 4K read | 1,050K IOPS |
| NAND | 3D TLC, 238-layer |
| Cache | DDR4 DRAM, 2 GB |
| Endurance | 1,200 TBW (0.33 DWPD) |
| Warranty | 5 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
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Cite this page: Hardware Spec Index, “Caldera SN-6556 Ultra 2TB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/41676449 (accessed 2026-10-26).