Hardware Spec Index

Caldera SN-6640 XT 1TB PCIe 3.0 NVMe M.2 2280 SSD

SSDs · Caldera · SKU SN6640-XT · Released 2019 · Updated 2026-10-25

Key facts

Benchmark index8,175 (SSDs scale)
Category rank#37,805
Street price$159
Power6 W (active)
Performance per dollar51.42
Released2019

Specifications

BrandCaldera
ModelCaldera SN-6640 XT
Capacity1 TB
Form factorM.2 2280
InterfacePCIe 3.0 x4, NVMe 1.4
Sequential read2,300 MB/s
Sequential write1,700 MB/s
Random 4K read390K IOPS
NAND3D TLC, 238-layer
CacheDRAM-less (HMB)
Endurance600 TBW (0.33 DWPD)
Warranty5 years
HeatsinkNone

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-6640 XT 1TB PCIe 3.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/4121496 (accessed 2026-10-25).