Hardware Spec Index

Caldera SN-8639 XT 1TB PCIe 4.0 NVMe M.2 2280 SSD

SSDs · Caldera · SKU SN8639-XT · Released 2020 · Updated 2026-10-22

Key facts

Benchmark index7,893 (SSDs scale)
Category rank#39,238
Street price$139
Power6 W (active)
Performance per dollar56.78
Released2020

Specifications

BrandCaldera
ModelCaldera SN-8639 XT
Capacity1 TB
Form factorM.2 2280
InterfacePCIe 4.0 x4, NVMe 2.0
Sequential read6,100 MB/s
Sequential write5,400 MB/s
Random 4K read750K IOPS
NAND3D QLC, 176-layer
CacheDRAM-less (HMB)
Endurance200 TBW (0.18 DWPD)
Warranty3 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-8639 XT 1TB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/80437350 (accessed 2026-10-22).