We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Green 288-pin DDR4 DIMM with black chips and gold contacts

A-Tech

A-Tech 16GB DDR4 2666 ECC RDIMM 1Rx4 HP 1XD85AA 825109-091 838081-B21 867855-B21 872837-C91 Server Memory

SKU CH-AT6M-84MRE

16 GB DDR4 2666 ECC registered DIMM for HP servers, CL19 1.2 V 288-pin module

  • Capacity16GB
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCYes
  • Buffered/RegisteredRegistered
  • ECC protection guards data integrity with registered DDR4 2666 operation
  • 16GB capacity expands server workloads using a single 288-pin module
  • CL19 latency at 1.20V balances speed and power efficiency
  • 1Rx4 rank organisation optimises density for compatible HP platforms
  • Major-brand chips deliver tested reliability for continuous uptime

16GB DDR4 2666 ECC RDIMM for HP Servers

This registered DIMM delivers 16GB of error-correcting DDR4 memory at 2666MHz. It is built for HP server and workstation platforms that require registered ECC modules. The single-rank 1Rx4 organisation uses major-brand chips at the standard 1.2V DDR4 voltage.

Registered ECC with 1Rx4 organisation

The module is a registered ECC RDIMM, not an unbuffered UDIMM or load-reduced LRDIMM. That distinction decides whether the memory will initialise on your HP system. The 1Rx4 rank layout and CL19 latency match the original HP part specifications listed for this upgrade.

Major-brand chips tested for server reliability

A-Tech assembles each module with major-brand DRAM components and subjects every stick to quality-assurance testing before shipment. The result is a drop-in replacement for HP part numbers such as 825109-091 and 872837-C91 that is backed by a lifetime warranty and US-based technical support.

Highlights

  • ECC protection guards data integrity with registered DDR4 2666 operation
  • 16GB capacity expands server workloads using a single 288-pin module
  • CL19 latency at 1.20V balances speed and power efficiency
  • 1Rx4 rank organisation optimises density for compatible HP platforms
  • Major-brand chips deliver tested reliability for continuous uptime

Specifications

BrandA-Tech
Capacity16GB
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx4
ChipsetMajor Brand Chipset
FeaturesMajor Brand Chips

Questions about this item

What does the 2666MHz speed mean once the module is installed in a server?

The module runs at 2666MHz PC4-21300 with CL19 latency, delivering the rated throughput when the platform supports DDR4 2666 operation.

How does the DDR4 288-pin RDIMM interface limit performance in practice?

The registered DDR4 DIMM uses the standard 288-pin interface at 1.20V, so maximum speed is capped by the memory controller and platform qualification.

What physical slot and clearance does this 1Rx4 ECC RDIMM require?

It fits a standard 288-pin DDR4 DIMM slot; the 1Rx4 registered design matches the mechanical and electrical layout for compatible HP server boards.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.