Hardware Spec Index

Caldera SN-4640 XT 1TB PCIe 4.0 NVMe M.2 2230 SSD

SSDs · Caldera · SKU SN4640-XT · Released 2023 · Updated 2026-10-20

Key facts

Benchmark index6,542 (SSDs scale)
Category rank#28,915
Street price$99
Power8 W (active)
Performance per dollar66.08
Released2023

Specifications

BrandCaldera
ModelCaldera SN-4640 XT
Capacity1 TB
Form factorM.2 2230
InterfacePCIe 4.0 x4, NVMe 2.0
Sequential read6,900 MB/s
Sequential write5,700 MB/s
Random 4K read770K IOPS
NAND3D QLC, 238-layer
CacheDRAM-less (HMB)
Endurance200 TBW (0.18 DWPD)
Warranty3 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-4640 XT 1TB PCIe 4.0 NVMe M.2 2230 SSD”, https://vextor7.com/item/20050225 (accessed 2026-10-20).