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 silver label

A-Tech

A-Tech 8GB DDR4 2666MHz ECC RDIMM 1Rx8 CL19 1.2V 288-Pin Server RAM

SKU CH-K9HW-GMNZF

An 8 GB DDR4-2666 registered ECC DIMM with CL19 latency and 1.2 V operation for server and workstation upgrades

  • Capacity8GB
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCYes
  • Buffered/RegisteredRegistered
  • ECC protection guards data integrity in servers
  • Registered design stabilises signal for heavy workloads
  • 8 GB capacity adds headroom for virtualization
  • DDR4 2666 MHz speed matches PC4-21300 spec
  • 2 V operation keeps power draw low

Server Memory Upgrade

This 8 GB DDR4 registered DIMM adds ECC protection to compatible server and workstation platforms. It runs at 2666 MHz with a CL19 latency and operates at the standard 1.2 V. The module uses a 1Rx8 organisation and fits 288 pin slots.

Replacement for Crucial CT8G4RFS8266

The stick is a direct equivalent for the Crucial CT8G4RFS8266 part number. It suits administrators who need to replace a failed module or expand capacity without changing memory generation. The jump is worthwhile when the system already supports DDR4 2666 registered ECC and an additional 8 GB rank is required.

Sustained Load Behaviour

Registered buffering and ECC correction keep data integrity stable during continuous multi-threaded workloads. The 1.2 V operating point limits thermal output during extended operation. Quality assurance testing on each module aims to deliver consistent throughput over long uptime periods.

Highlights

  • ECC protection guards data integrity in servers
  • Registered design stabilises signal for heavy workloads
  • 8 GB capacity adds headroom for virtualization
  • DDR4 2666 MHz speed matches PC4-21300 spec
  • 2 V operation keeps power draw low

Specifications

BrandA-Tech
SeriesCompatible Replacement for Crucial
ModelCT8G4RFS8266
Capacity8GB
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx8
ChipsetMajor Brand Chipset
FeaturesCT8G4RFS8266

Questions about this item

Will this 288-pin DDR4 RDIMM fit my server's DIMM slots?

The module uses the standard 288-pin DDR4 DIMM form factor. It fits any server or workstation motherboard that accepts registered DDR4 memory.

What BIOS setting is often missed when installing this ECC RDIMM?

Enable ECC support in the BIOS after installation; the registered buffer and error-correction will not function until the platform firmware activates them.

When should I replace this 8 GB module?

Replace it if memory diagnostics report uncorrectable ECC errors, if the system fails to POST with the module seated, or when a capacity upgrade is required.

Also in this aisle

People compared these

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