Caldera SN-6421 Prime 4TB PCIe 4.0 NVMe M.2 2280 SSD
SSDs · Caldera · SKU SN6421-PRIME · Released 2023 · Updated 2026-10-26
Key facts
| Benchmark index | 12,930 (SSDs scale) |
|---|---|
| Category rank | #10,110 |
| Street price | $439 |
| Power | 6 W (active) |
| Performance per dollar | 29.45 |
| Released | 2023 |
Specifications
| Brand | Caldera |
|---|---|
| Model | Caldera SN-6421 Prime |
| Capacity | 4 TB |
| Form factor | M.2 2280 |
| Interface | PCIe 4.0 x4, NVMe 2.0 |
| Sequential read | 7,200 MB/s |
| Sequential write | 6,600 MB/s |
| Random 4K read | 1,360K IOPS |
| NAND | 3D TLC, 232-layer |
| Cache | DDR4 DRAM, 4 GB |
| Endurance | 2,400 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 |
|---|---|---|---|
| Caldera SN-5352 Edge 2TB PCIe 4.0 NVMe M.2 2280 SSD | 10,730 | $249 | Compare |
| Altrix SN-1125 Core 2TB PCIe 4.0 NVMe M.2 2280 SSD | 10,569 | $249 | Compare |
| Strivon SN-4801 Pro 1TB SATA 2.5-inch SSD | 3,862 | $39 | Compare |
| Strivon SN-8724 Core 2TB PCIe 4.0 NVMe M.2 2230 SSD | 13,452 | $449 | Compare |
| Caldera SN-4014 XT 1TB PCIe 4.0 NVMe M.2 2280 SSD | 8,069 | $159 | Compare |
| Altrix SN-5290 SE 8TB PCIe 3.0 NVMe M.2 2280 SSD | 13,165 | $449 | Compare |
Cite this page: Hardware Spec Index, “Caldera SN-6421 Prime 4TB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/94092366 (accessed 2026-10-26).