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

  • Total capacity8 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • 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.

How it compares

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

Price $55.99
Cheaper than about 82% of the 6,523 comparable items (median $188.99).
Total capacity 8 GB
Lower than about 80% of the 6,064 comparable items (median 32 GB).
Price per GB $7.00 per GB
Typical for this category: the median of 6,064 items is $7.25 per GB.

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Brand nameA-Tech
Product lineCompatible Replacement for Crucial
Model nameCT8G4RFS8266
Total capacity8 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank1Rx8
Power
Rated voltage1.2 V

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.

More in ECC Server RAM

Similar items