Hardware Spec Index

Caldera SN-6991 Core 4TB PCIe 3.0 NVMe M.2 2280 SSD

SSDs · Caldera · SKU SN6991-CORE · Released 2019 · Updated 2026-10-23

Key facts

Benchmark index13,855 (SSDs scale)
Category rank#13,134
Street price$469
Power6 W (active)
Performance per dollar29.54
Released2019

Specifications

BrandCaldera
ModelCaldera SN-6991 Core
Capacity4 TB
Form factorM.2 2280
InterfacePCIe 3.0 x4, NVMe 1.4
Sequential read2,900 MB/s
Sequential write2,100 MB/s
Random 4K read570K IOPS
NAND3D TLC, 238-layer
CacheDDR4 DRAM, 4 GB
Endurance2,400 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-6991 Core 4TB PCIe 3.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/660899 (accessed 2026-10-23).