Hardware Spec Index

Caldera SN-7638 Ultra 8TB PCIe 4.0 NVMe M.2 2280 SSD

SSDs · Caldera · SKU SN7638-ULTRA · Released 2021 · Updated 2026-10-19

Key facts

Benchmark index12,146 (SSDs scale)
Category rank#38,690
Street price$399
Power7 W (active)
Performance per dollar30.44
Released2021

Specifications

BrandCaldera
ModelCaldera SN-7638 Ultra
Capacity8 TB
Form factorM.2 2280
InterfacePCIe 4.0 x4, NVMe 2.0
Sequential read6,900 MB/s
Sequential write6,300 MB/s
Random 4K read700K IOPS
NAND3D TLC, 238-layer
CacheDDR4 DRAM, 8 GB
Endurance4,800 TBW (0.33 DWPD)
Warranty5 years
HeatsinkHeatsink edition available

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-7638 Ultra 8TB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/7963939 (accessed 2026-10-19).