Hardware Spec Index

Caldera SN-9958 XT 4TB PCIe 4.0 NVMe M.2 2280 SSD

SSDs · Caldera · SKU SN9958-XT · Released 2025 · Updated 2026-10-23

Key facts

Benchmark index10,396 (SSDs scale)
Category rank#556
Street price$259
Power5 W (active)
Performance per dollar40.14
Released2025

Specifications

BrandCaldera
ModelCaldera SN-9958 XT
Capacity4 TB
Form factorM.2 2280
InterfacePCIe 4.0 x4, NVMe 2.0
Sequential read5,200 MB/s
Sequential write4,900 MB/s
Random 4K read1,230K IOPS
NAND3D TLC, 232-layer
CacheDDR4 DRAM, 4 GB
Endurance2,400 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-9958 XT 4TB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/8007664 (accessed 2026-10-23).