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Green rectangular memory module with gold edge connector and black chips

AddOn

AddOn 40758-091-AM 32GB DDR4-2666 CL17 ECC RDIMM server RAM

SKU CH-QH2Q-25MSM MPN 40758-091-AM

32 GB DDR4-2666 registered ECC RDIMM with CL17 latency and 1.2 V operation for compatible HP servers

  • Total capacity32 GB
  • CAS latencyCL17
  • Rated voltage1.2 V
  • ECC supportECC
  • Product type288-Pin DDR4 RDIMM
  • ECC protection prevents data corruption with built-in error correction
  • Registered design improves signal integrity for stable server operation
  • 32 GB capacity expands memory headroom for virtualisation workloads
  • DDR4-2666 speed delivers 2666 MT/s bandwidth at 1.2 V
  • HP 840758-091 compatibility ensures drop-in fit for qualified platforms

32GB DDR4-2666 ECC RDIMM

This 32GB DDR4-2666MHz registered ECC module targets administrators expanding HP server memory. The dual-rank x4 design delivers error correction for data integrity in virtualisation and database workloads. It operates at a standard 1.2V across 288 pins with CL17 latency.

Capacity and headroom

A single 32GB stick adds substantial headroom for multi-tenant VMs and in-memory analytics. Dual-rank organisation keeps bandwidth high while leaving DIMM slots free for further growth. Workloads exceeding 32GB per channel will require additional modules.

Thermals noise and power

Registered buffering and 1.2V operation keep heat output low inside dense chassis. Passive cooling via system airflow is sufficient; no active fan is present on the module. Power draw remains modest, matching standard DDR4 RDIMM profiles.

How it compares

Measured against everything we stock in ECC Server RAM, at today’s prices. Recalculated every night.

Price $607.99
Pricier than about 73% of the 6,523 comparable items (median $188.99).
Total capacity 32 GB
Typical for this category: the median of 6,064 items is 32 GB.
Price per GB $19.00 per GB
Pricier than about 80% of the 6,064 comparable items (median $7.25 per GB).

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Specifications

Product
Brand nameAddOn - Memory Upgrades
Model name40758-091-AM
Part number40758-091-AM
Total capacity32 GB
Product type288-Pin DDR4 RDIMM
Memory
CAS latencyCL17
ECC supportECC
Power
Rated voltage1.2 V
Size & build
Shipping weight0.23 kg
Package size178 × 51 × 51 mm

Questions about this item

Will this 288-pin DDR4 RDIMM run in a server that already has 2666 MHz ECC modules installed?

Yes — the module operates at 2666 MHz, 1.2 V, CL17 and uses the same 288-pin RDIMM form factor, so it will match existing DDR4-2666 ECC RDIMMs.

How can I confirm the 32 GB dual-rank x4 module is detected correctly after installation?

Check the BIOS or UEFI memory information screen; it should show 32 GB, DDR4-2666, ECC registered, dual-rank x4 organisation.

Does the box contain anything besides the single 32 GB memory module?

No — the package includes only 1x memory module; no extra cables, brackets or documentation are supplied.

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