Hardware Spec Index

Caldera SN-6491 Plus 4TB PCIe 3.0 NVMe M.2 2280 SSD

SSDs · Caldera · SKU SN6491-PLUS · Released 2019 · Updated 2026-10-22

Key facts

Benchmark index11,083 (SSDs scale)
Category rank#37,191
Street price$309
Power5 W (active)
Performance per dollar35.87
Released2019

Specifications

BrandCaldera
ModelCaldera SN-6491 Plus
Capacity4 TB
Form factorM.2 2280
InterfacePCIe 3.0 x4, NVMe 1.4
Sequential read3,200 MB/s
Sequential write2,600 MB/s
Random 4K read460K IOPS
NAND3D TLC, 238-layer
CacheDDR4 DRAM, 4 GB
Endurance2,400 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-6491 Plus 4TB PCIe 3.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/85703989 (accessed 2026-10-22).