Hardware Spec Index

Caldera SN-6640 Prime 4TB PCIe 5.0 NVMe M.2 2280 SSD

SSDs · Caldera · SKU SN6640-PRIME · Released 2026 · Updated 2026-10-22

Key facts

Benchmark index11,644 (SSDs scale)
Category rank#6,628
Street price$379
Power8 W (active)
Performance per dollar30.72
Released2026

Specifications

BrandCaldera
ModelCaldera SN-6640 Prime
Capacity4 TB
Form factorM.2 2280
InterfacePCIe 5.0 x4, NVMe 2.0
Sequential read10,500 MB/s
Sequential write8,700 MB/s
Random 4K read2,270K IOPS
NAND3D TLC, 218-layer
CacheLPDDR4 DRAM, 4 GB
Endurance2,400 TBW (0.33 DWPD)
Warranty5 years
HeatsinkIncluded (recommended for sustained loads)

Related guides

NVMe SSDs ExplainedM.2 SSD Sizes and KeysSSD Endurance ExplainedDRAM vs DRAM-less SSDsPCIe 5.0 ExplainedPCIe 4.0 vs PCIe 5.0

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Cite this page: Hardware Spec Index, “Caldera SN-6640 Prime 4TB PCIe 5.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/320096 (accessed 2026-10-22).