Hardware Spec Index

Caldera DR-3991 Ultra DDR4-2666 8GB (2×4GB) CL19 SO-DIMM Kit

Memory · Caldera · SKU DR3991-ULTRA · Released 2020 · Updated 2026-10-21

Key facts

Benchmark index2,973 (Memory scale)
Category rank#22,017
Street price$29
Power4 W
Performance per dollar102.52
Released2020

Specifications

BrandCaldera
ModelCaldera DR-3991 Ultra
Memory typeDDR4 SO-DIMM (260-pin)
SpeedDDR4-2666 (2,666 MT/s)
Kit capacity8 GB (2 × 4 GB)
Timings19-27-27-55
CAS latencyCL19
First-word latency14.25 ns
Voltage1.20 V
ProfileJEDEC (no profile needed)
ECCNon-ECC
Power managementMotherboard-regulated
Heat spreaderNone (low profile)

Related guides

DDR4 vs DDR5CAS Latency (CL) and RAM TimingsDDR5 Memory ExplainedXMP vs EXPO

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All Memory · JSON

Cite this page: Hardware Spec Index, “Caldera DR-3991 Ultra DDR4-2666 8GB (2×4GB) CL19 SO-DIMM Kit”, https://vextor7.com/item/4416993 (accessed 2026-10-21).