Hardware Spec Index

Caldera SN-3948 Ultra 4TB PCIe 5.0 NVMe M.2 2280 SSD

SSDs · Caldera · SKU SN3948-ULTRA · Released 2026 · Updated 2026-10-21

Key facts

Benchmark index14,900 (SSDs scale)
Category rank#2,314
Street price$599
Power9 W (active)
Performance per dollar24.87
Released2026

Specifications

BrandCaldera
ModelCaldera SN-3948 Ultra
Capacity4 TB
Form factorM.2 2280
InterfacePCIe 5.0 x4, NVMe 2.0
Sequential read11,300 MB/s
Sequential write8,800 MB/s
Random 4K read2,460K 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-3948 Ultra 4TB PCIe 5.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/8958792 (accessed 2026-10-21).