Hardware Spec Index

Caldera SN-6556 Ultra 2TB PCIe 4.0 NVMe M.2 2280 SSD

SSDs · Caldera · SKU SN6556-ULTRA · Released 2020 · Updated 2026-10-18

Key facts

Benchmark index9,201 (SSDs scale)
Category rank#13,267
Street price$179
Power7 W (active)
Performance per dollar51.40
Released2020

Specifications

BrandCaldera
ModelCaldera SN-6556 Ultra
Capacity2 TB
Form factorM.2 2280
InterfacePCIe 4.0 x4, NVMe 2.0
Sequential read6,600 MB/s
Sequential write4,800 MB/s
Random 4K read800K IOPS
NAND3D TLC, 218-layer
CacheDDR4 DRAM, 2 GB
Endurance1,200 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

Similar SSDs

ModelBenchmarkPriceCompare
Novexa SN-6715 Prime 500GB PCIe 4.0 NVMe M.2 2280 SSD5,077$59Compare
Mirenta SN-1838 Prime 500GB SATA 2.5-inch SSD4,313$49Compare
Novexa SN-5861 Prime 1TB PCIe 4.0 NVMe M.2 2280 SSD5,762$79Compare
Novexa SN-7339 XT 1TB SATA 2.5-inch SSD3,387$29Compare
Altrix SN-3574 Ti 2TB PCIe 4.0 NVMe M.2 2280 SSD7,271$129Compare
Altrix SN-9457 Ti 2TB PCIe 4.0 NVMe M.2 2280 SSD10,614$309Compare

All SSDs · JSON

Cite this page: Hardware Spec Index, “Caldera SN-6556 Ultra 2TB PCIe 4.0 NVMe M.2 2280 SSD”, https://vextor7.com/item/2503512 (accessed 2026-10-18).