Caldera SN-6688 Ultra 2TB PCIe 4.0 NVMe M.2 2280 SSD
SSDs · Caldera · SKU SN6688-ULTRA · Released 2020 · Updated 2026-10-20
Key facts
| Benchmark index | 10,952 (SSDs scale) |
|---|---|
| Category rank | #15,975 |
| Street price | $329 |
| Power | 7 W (active) |
| Performance per dollar | 33.29 |
| Released | 2020 |
Specifications
| Brand | Caldera |
|---|---|
| Model | Caldera SN-6688 Ultra |
| Capacity | 2 TB |
| Form factor | M.2 2280 |
| Interface | PCIe 4.0 x4, NVMe 2.0 |
| Sequential read | 6,100 MB/s |
| Sequential write | 5,400 MB/s |
| Random 4K read | 940K IOPS |
| NAND | 3D TLC, 238-layer |
| Cache | DDR4 DRAM, 2 GB |
| Endurance | 1,200 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-6343 Edge 4TB PCIe 4.0 NVMe M.2 2280 SSD | 11,978 | $339 | Compare |
| Novexa SN-4745 Ti 8TB PCIe 5.0 NVMe M.2 2280 SSD | 13,844 | $549 | Compare |
| Caldera SN-5843 XT 2TB PCIe 3.0 NVMe M.2 2280 SSD | 9,096 | $229 | Compare |
| Strivon SN-4646 XT 1TB PCIe 4.0 NVMe M.2 2280 SSD | 7,687 | $139 | Compare |
| Altrix SN-7923 SE 4TB PCIe 5.0 NVMe M.2 2280 SSD | 11,864 | $309 | Compare |
| Altrix SN-7498 Prime 8TB PCIe 5.0 NVMe M.2 2280 SSD | 12,444 | $409 | Compare |
Cite this page: Hardware Spec Index, “Caldera SN-6688 Ultra 2TB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/7346403 (accessed 2026-10-20).