Hardware Spec Index

Caldera SN-6640 XT 1TB PCIe 4.0 NVMe M.2 2280 SSD

SSDs · Caldera · SKU SN6640-XT · Released 2025 · Updated 2026-10-26

Key facts

Benchmark index5,722 (SSDs scale)
Category rank#38,650
Street price$89
Power5 W (active)
Performance per dollar64.29
Released2025

Specifications

BrandCaldera
ModelCaldera SN-6640 XT
Capacity1 TB
Form factorM.2 2280
InterfacePCIe 4.0 x4, NVMe 2.0
Sequential read7,300 MB/s
Sequential write5,300 MB/s
Random 4K read840K IOPS
NAND3D TLC, 232-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 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/3107520 (accessed 2026-10-26).