Hardware Spec Index

Caldera SN-6639 Ultra 2TB PCIe 4.0 NVMe M.2 2280 SSD

SSDs · Caldera · SKU SN6639-ULTRA · Released 2023 · Updated 2026-10-24

Key facts

Benchmark index10,989 (SSDs scale)
Category rank#48,335
Street price$299
Power6 W (active)
Performance per dollar36.75
Released2023

Specifications

BrandCaldera
ModelCaldera SN-6639 Ultra
Capacity2 TB
Form factorM.2 2280
InterfacePCIe 4.0 x4, NVMe 2.0
Sequential read6,000 MB/s
Sequential write4,400 MB/s
Random 4K read850K IOPS
NAND3D TLC, 232-layer
CacheDDR4 DRAM, 2 GB
Endurance1,200 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-6639 Ultra 2TB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/7559435 (accessed 2026-10-24).