Hardware Spec Index

Caldera SN-4959 XT 4TB PCIe 5.0 NVMe M.2 2280 SSD

SSDs · Caldera · SKU SN4959-XT · Released 2026 · Updated 2026-10-25

Key facts

Benchmark index12,723 (SSDs scale)
Category rank#15,369
Street price$419
Power11 W (active)
Performance per dollar30.37
Released2026

Specifications

BrandCaldera
ModelCaldera SN-4959 XT
Capacity4 TB
Form factorM.2 2280
InterfacePCIe 5.0 x4, NVMe 2.0
Sequential read10,700 MB/s
Sequential write9,200 MB/s
Random 4K read2,160K IOPS
NAND3D TLC, 218-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-4959 XT 4TB PCIe 5.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/21872139 (accessed 2026-10-25).