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 rectangular DDR4 DIMM with black chips and gold edge contacts

SAMSUNG

SAMSUNG M393A2K43CB2-CTD 16GB DDR4 2666 ECC Registered memory upgrade

SKU CH-JZKK-61WKJ MPN M393A2K43CB2-CTD

16 GB DDR4 2666 ECC registered 288-pin DIMM with CL19 latency and 1.20 V operation

  • Total capacity16 GB
  • Rated speedDDR4 2666 (PC4 21300)
  • Rated voltage1.2 V
  • Buffer typeRegistered
  • Memory rank2Rx8
  • 16 GB DDR4 2666 MHz capacity for demanding server workloads
  • ECC registered design detects and corrects single-bit errors automatically
  • CL19 CAS latency provides responsive data access timing
  • 20 V operating voltage reduces power draw in dense configurations
  • 288-pin DIMM form factor fits standard DDR4 registered slots

16GB DDR4 2666 ECC Registered DIMM

This 16GB DDR4 module runs at 2666 MHz with a CL19 latency and operates at 1.20V. It uses a 288-pin registered DIMM form factor with 2Rx8 organisation and on-board ECC for error correction. The part is built for servers and workstations that require registered memory with data-integrity features.

Fits registered DDR4 platforms needing 288-pin DIMMs

The module plugs into standard 288-pin DDR4 slots that support registered signal processing and ECC. It draws 1.20V and conforms to the PC4-21300 / PC4-21333 standard. Registered buffering reduces electrical load on the memory controller, freeing headroom for larger memory populations in multi-slot chassis.

Replaces non-ECC or unbuffered DDR4 when data

The jump is worth it when the platform demands registered ECC memory for mission-critical workloads. It will not work in systems that only accept unbuffered non-ECC modules or that require a different DDR generation. Buyers needing higher capacities per slot or faster speeds must look beyond this 16GB 2666 MHz part.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $65.99
Cheaper than about 74% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $4.12 per GB
Cheaper than about 84% of the 20,941 comparable items (median $8.19 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 nameSAMSUNG
Model nameM393A2K43CB2-CTD
Total capacity16 GB
Performance
Rated speedDDR4 2666 (PC4 21300)
Memory
ECC supportYes
Buffer typeRegistered
Memory rank2Rx8
Power
Rated voltage1.2 V
Size & build
Shipping weight0.23 kg
Package size178 × 51 × 13 mm

Questions about this item

How does the 1.20 V voltage affect thermal limits when the module runs continuously at 2666 MHz?

At 1.20 V the DDR4 module draws minimal power, so sustained 2666 MHz operation stays within standard server thermal envelopes without extra cooling.

What acoustic or thermal impact should I expect from the registered ECC design during all-day workloads?

Registered ECC DIMMs add negligible heat and produce no audible noise; the memory controller handles parity internally.

Which motherboard slot and chipset combination is required for this 288-pin registered DDR4 DIMM to function?

A server-grade motherboard with 288-pin DDR4 slots that explicitly supports registered ECC memory is required.

More in Model-Specific Memory Upgrades

Similar items