Hardware Spec Index

Caldera SN-6638 Plus 4TB PCIe 3.0 NVMe M.2 2280 SSD

SSDs · Caldera · SKU SN6638-PLUS · Released 2019 · Updated 2026-10-25

Key facts

Benchmark index9,701 (SSDs scale)
Category rank#49,434
Street price$279
Power5 W (active)
Performance per dollar34.77
Released2019

Specifications

BrandCaldera
ModelCaldera SN-6638 Plus
Capacity4 TB
Form factorM.2 2280
InterfacePCIe 3.0 x4, NVMe 1.4
Sequential read2,900 MB/s
Sequential write2,700 MB/s
Random 4K read450K IOPS
NAND3D TLC, 232-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-6638 Plus 4TB PCIe 3.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/93973293 (accessed 2026-10-25).