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Two green DDR4 ECC UDIMM modules, 288-pin, matte black chips

A-Tech

A-Tech 16GB 2Rx8 DDR4 2666 ECC UDIMM 1.2V 288-Pin Kit

SKU CH-43D2-XC351

ECC UDIMM kit with two 8 GB dual-rank modules running at 2666 MHz CL19 for server and workstation reliability

  • CAS latencyCL19
  • Memory rank2Rx8
  • 16 GB dual-rank kit expands server capacity
  • DDR4 2666 MHz CL19 speeds up workloads
  • ECC UDIMM protects data integrity in critical tasks
  • 2 V standard voltage keeps power draw low
  • 288-pin DIMM fits compatible server and workstation slots

ECC UDIMM kit for servers and workstations

This 16 GB kit contains two 8 GB DDR4 ECC unbuffered DIMMs rated at 2666 MHz with CL19 latency. Dual-rank x8 organisation supports error-correcting code operation on compatible server and workstation platforms only. The modules run at the standard 1.2 V DDR4 voltage.

DDR4 2666 MT/s interface limits bandwidth

The 2666 MT/s data rate caps peak throughput at the PC4-21300 level, so memory-intensive workloads cannot exceed that bandwidth ceiling. ECC parity bits consume a portion of each transfer, reducing usable payload bandwidth compared with non-ECC modules at the same clock. Unbuffered topology adds no register delay but also prevents registered-DIMM channel scaling.

Upgrades from smaller

Replacing a lower-capacity kit or non-ECC modules adds both error correction and extra rank density for multi-threaded server tasks. The jump is worthwhile when the platform supports DDR4 ECC UDIMM and the workload demands data integrity at 2666 MHz. Systems limited to slower DDR4 speeds or registered DIMM slots will not benefit.

How it compares

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

Price $175.99
Typical for this category: the median of 6,523 items is $188.99.

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

Specifications

Memory
CAS latencyCL19
Memory rank2Rx8

Questions about this item

Should I choose the 2Rx8 dual-rank kit or a single-rank alternative for my server?

This kit uses 2Rx8 dual-rank modules, which can improve memory bandwidth on platforms that benefit from rank interleaving; verify your system's qualified vendor list to confirm 2Rx8 support before ordering.

What does the 2666 MHz rating deliver in a real workload?

At DDR4 2666 MHz with CL19 latency the modules transfer data at the PC4-21300 rate, reducing load times and improving responsiveness for multi-threaded server and workstation tasks.

Is the ECC UDIMM interface compatible with standard desktop DDR4 slots?

No — these are ECC unbuffered DIMMs built for DDR4 servers and workstations only; they will not function in consumer desktop or laptop memory controllers.

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