Caldera SN-6421 Plus 1TB SATA 2.5-inch SSD
SSDs · Caldera · SKU SN6421-PLUS · Released 2021 · Updated 2026-10-19
Key facts
| Benchmark index | 3,792 (SSDs scale) |
|---|---|
| Category rank | #14,085 |
| Street price | $39 |
| Power | 3 W (active) |
| Performance per dollar | 97.23 |
| Released | 2021 |
Specifications
| Brand | Caldera |
|---|---|
| Model | Caldera SN-6421 Plus |
| Capacity | 1 TB |
| Form factor | 2.5" SATA (7 mm) |
| Interface | SATA 6 Gb/s (AHCI) |
| Sequential read | 550 MB/s |
| Sequential write | 520 MB/s |
| Random 4K read | 98K IOPS |
| NAND | 3D QLC, 176-layer |
| Cache | DRAM-less (SLC cache) |
| Endurance | 240 TBW (0.22 DWPD) |
| Warranty | 3 years |
| Heatsink | None |
Related guides
SSD Endurance ExplainedDRAM vs DRAM-less SSDsNVMe SSDs ExplainedPCIe 4.0 vs PCIe 5.0M.2 SSD Sizes and Keys
Similar SSDs
| Model | Benchmark | Price | Compare |
|---|---|---|---|
| Strivon SN-7669 Prime 1TB SATA 2.5-inch SSD | 3,406 | $39 | Compare |
| Altrix SN-8436 Core 2TB PCIe 4.0 NVMe M.2 2230 SSD | 9,417 | $209 | Compare |
| Mirenta SN-2865 Pro 8TB PCIe 5.0 NVMe M.2 2280 SSD | 10,874 | $329 | Compare |
| Strivon SN-3501 Ti 8TB PCIe 5.0 NVMe M.2 2280 SSD | 14,900 | $499 | Compare |
| Novexa SN-4009 Max 4TB PCIe 5.0 NVMe M.2 2280 SSD | 14,079 | $509 | Compare |
| Altrix SN-8667 Core 4TB PCIe 3.0 NVMe M.2 2280 SSD | 11,724 | $429 | Compare |
Cite this page: Hardware Spec Index, “Caldera SN-6421 Plus 1TB SATA 2.5-inch SSD”, https://vextor7.com/item/17501493 (accessed 2026-10-19).