Hardware Spec Index

Caldera SN-1821 XT 4TB PCIe 4.0 NVMe M.2 2280 SSD

SSDs · Caldera · SKU SN1821-XT · Released 2021 · Updated 2026-10-19

Key facts

Benchmark index12,835 (SSDs scale)
Category rank#47,762
Street price$469
Power6 W (active)
Performance per dollar27.37
Released2021

Specifications

BrandCaldera
ModelCaldera SN-1821 XT
Capacity4 TB
Form factorM.2 2280
InterfacePCIe 4.0 x4, NVMe 2.0
Sequential read5,700 MB/s
Sequential write4,700 MB/s
Random 4K read1,200K IOPS
NAND3D TLC, 238-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-1821 XT 4TB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/11035637 (accessed 2026-10-19).