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Green circuit board DDR4 DIMM with black chips and gold contacts

A-Tech

A-Tech 16GB DDR4 2666 ECC RDIMM 1Rx4 CL19 1.20V Server RAM

SKU CH-23X5-WHJBH

A 16 GB DDR4 2666 ECC registered DIMM with CL19 latency and 1.2 V operation for server workloads

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL19
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • 16 GB capacity handles heavy server workloads
  • DDR4 2666 speed delivers 21300 MT/s bandwidth
  • ECC RDIMM design detects and corrects data errors
  • Registered 1Rx4 layout reduces electrical load on memory bus
  • 20 V standard voltage keeps power draw low

Server-grade 16 GB DDR4 module

This registered ECC DIMM delivers 16 GB of DDR4 memory at 2666 MHz with CL19 latency. It is built for servers and workstations that require error correction and signal buffering for data integrity. The module runs at the standard 1.20 V DDR4 voltage. Buyers who need non-ECC or unbuffered memory for consumer desktop boards cannot use this product.

Fits 288-pin DDR4 RDIMM slots

The stick plugs into a standard 288-pin DDR4 RDIMM socket on a compatible server or workstation motherboard. Its registered design reduces electrical load on the memory controller, freeing headroom for larger total capacities across multiple slots. Systems that only accept UDIMM or SO-DIMM form factors will not accept this module.

Sustained operation at rated speed

Under continuous workloads the module maintains its 2666 MHz data rate and 1.20 V supply without throttling. ECC circuitry corrects single-bit errors on the fly, preserving stability during long compute runs. Workloads that exceed the single 16 GB capacity will require additional modules to avoid paging.

How it compares

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

Price $112.99
Cheaper than about 64% of the 6,523 comparable items (median $188.99).
Total capacity 16 GB
Lower than about 60% of the 6,064 comparable items (median 32 GB).
Price per GB $7.06 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
Total capacity16 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL19
ECC supportYes
Buffer typeRegistered
Memory rank1Rx4
Power
Rated voltage1.2 V

Questions about this item

How does the CL19 latency affect sustained throughput?

CL19 means each access waits nineteen cycles at 2666 MHz, so sustained bandwidth is limited by that timing rather than raw clock speed.

What heat or power should I expect when this RDIMM runs continuously?

The module operates at 1.20 V standard DDR4 voltage; registered buffering adds minimal extra draw, so thermal output stays low in a server chassis with normal airflow.

Which motherboard feature must my system already have for this ECC RDIMM to function?

Your board must support DDR4 288-pin registered DIMM slots with ECC enabled in the BIOS; consumer platforms that only accept unbuffered UDIMMs will not work.

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