Hardware Spec Index

Caldera SN-6638 Prime 4TB PCIe 5.0 NVMe M.2 2280 SSD

SSDs · Caldera · SKU SN6638-PRIME · Released 2024 · Updated 2026-10-25

Key facts

Benchmark index13,812 (SSDs scale)
Category rank#24,167
Street price$429
Power11 W (active)
Performance per dollar32.20
Released2024

Specifications

BrandCaldera
ModelCaldera SN-6638 Prime
Capacity4 TB
Form factorM.2 2280
InterfacePCIe 5.0 x4, NVMe 2.0
Sequential read14,300 MB/s
Sequential write13,300 MB/s
Random 4K read1,570K IOPS
NAND3D TLC, 176-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-6638 Prime 4TB PCIe 5.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/2125248 (accessed 2026-10-25).