Caldera SN-6678 Ultra 4TB PCIe 4.0 NVMe M.2 2280 SSD
SSDs · Caldera · SKU SN6678-ULTRA · Released 2023 · Updated 2026-10-20
Key facts
| Benchmark index | 12,325 (SSDs scale) |
|---|---|
| Category rank | #39,706 |
| Street price | $439 |
| Power | 5 W (active) |
| Performance per dollar | 28.08 |
| Released | 2023 |
Specifications
| Brand | Caldera |
|---|---|
| Model | Caldera SN-6678 Ultra |
| Capacity | 4 TB |
| Form factor | M.2 2280 |
| Interface | PCIe 4.0 x4, NVMe 2.0 |
| Sequential read | 7,000 MB/s |
| Sequential write | 6,200 MB/s |
| Random 4K read | 890K IOPS |
| NAND | 3D TLC, 176-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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| Novexa SN-4105 XT 4TB PCIe 4.0 NVMe M.2 2280 SSD | 13,951 | $499 | Compare |
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Cite this page: Hardware Spec Index, “Caldera SN-6678 Ultra 4TB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/48419495 (accessed 2026-10-20).