Caldera SN-6420 Plus 4TB PCIe 4.0 NVMe M.2 2280 SSD
SSDs · Caldera · SKU SN6420-PLUS · Released 2020 · Updated 2026-10-23
Key facts
| Benchmark index | 12,784 (SSDs scale) |
|---|---|
| Category rank | #24,768 |
| Street price | $439 |
| Power | 8 W (active) |
| Performance per dollar | 29.12 |
| Released | 2020 |
Specifications
| Brand | Caldera |
|---|---|
| Model | Caldera SN-6420 Plus |
| Capacity | 4 TB |
| Form factor | M.2 2280 |
| Interface | PCIe 4.0 x4, NVMe 2.0 |
| Sequential read | 6,600 MB/s |
| Sequential write | 6,300 MB/s |
| Random 4K read | 780K IOPS |
| NAND | 3D TLC, 218-layer |
| Cache | DDR4 DRAM, 4 GB |
| Endurance | 2,400 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-6420 Plus 4TB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/3915846 (accessed 2026-10-23).