Hardware Spec Index

Caldera SN-6659 XT 1TB PCIe 4.0 NVMe M.2 2280 SSD

SSDs · Caldera · SKU SN6659-XT · Released 2020 · Updated 2026-10-21

Key facts

Benchmark index6,693 (SSDs scale)
Category rank#15,623
Street price$109
Power6 W (active)
Performance per dollar61.40
Released2020

Specifications

BrandCaldera
ModelCaldera SN-6659 XT
Capacity1 TB
Form factorM.2 2280
InterfacePCIe 4.0 x4, NVMe 2.0
Sequential read7,300 MB/s
Sequential write5,500 MB/s
Random 4K read1,400K IOPS
NAND3D TLC, 232-layer
CacheDRAM-less (HMB)
Endurance600 TBW (0.33 DWPD)
Warranty5 years
HeatsinkHeatsink 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-6659 XT 1TB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/91827086 (accessed 2026-10-21).