Hardware Spec Index

Caldera DR-6645 Ultra DDR5-8400 128GB (4×32GB) CL40 Kit

Memory · Caldera · SKU DR6645-ULTRA · Released 2026 · Updated 2026-10-19

Key facts

Benchmark index8,900 (Memory scale)
Category rank#45,845
Street price$369
Power24 W
Performance per dollar24.12
Released2026

Specifications

BrandCaldera
ModelCaldera DR-6645 Ultra
Memory typeDDR5 UDIMM (288-pin)
SpeedDDR5-8400 (8,400 MT/s)
Kit capacity128 GB (4 × 32 GB)
Timings40-40-40-96
CAS latencyCL40
First-word latency9.52 ns
Voltage1.40 V
ProfileXMP 3.0 + EXPO
ECCOn-die ECC (not system ECC)
Power managementOn-module PMIC
Heat spreaderAluminum, no lighting

Related guides

DDR5 Memory ExplainedDDR4 vs DDR5CAS Latency (CL) and RAM TimingsXMP vs EXPO

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All Memory · JSON

Cite this page: Hardware Spec Index, “Caldera DR-6645 Ultra DDR5-8400 128GB (4×32GB) CL40 Kit”, https://vextor7.com/item/5452385 (accessed 2026-10-19).