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Green rectangular circuit board with gold contacts and black memory chips

SAMSUNG

SAMSUNG M393A4K40CB2-CTD 32GB DDR4 2666 ECC RDIMM memory upgrade

SKU CH-EY77-WAAV2 MPN M393A4K40CB2-CTD

32 GB DDR4-2666 ECC registered DIMM with CL19 latency and 1.2 V operation for Dell PowerEdge R740xd2 servers

  • Capacity32GB
  • Type288-Pin DDR4 SDRAM
  • SpeedDDR4 2666 (PC4 21300)
  • CAS LatencyCL19
  • Voltage1.20V
  • ECCYes
  • Reliable error correction with ECC registered design
  • 32GB capacity expands server memory headroom
  • DDR4 2666 speed feeds data to CPUs faster
  • 2V operation reduces power draw per module
  • Validated for Dell PowerEdge R740xd2 systems

Samsung 32GB DDR4-2666 ECC RDIMM

This 32GB DDR4-2666 ECC registered DIMM is built for Dell PowerEdge R740xd2 servers. It delivers 2666MHz speed with CL19 latency at 1.20V using Samsung chipsets. The 288-pin dual-rank module adds reliable capacity for virtualization and database workloads.

Upgrade from lower-capacity RDIMMs

Replacing smaller registered modules with this 32GB stick reduces the total slot count needed to reach a target capacity. The jump is worth it when the server currently swaps under load or cannot host the planned number of virtual machines. It maintains the existing service contract because it uses the same major-brand ICs as the OEM specification.

Handles heavy virtualization and in-memory databases

The 32GB capacity provides headroom for multiple VMs and large buffer pools without paging. Performance runs out when the application working set exceeds the total installed memory across all populated slots or when the memory controller limits the maximum supported capacity per channel.

Punti di forza

  • Reliable error correction with ECC registered design
  • 32GB capacity expands server memory headroom
  • DDR4 2666 speed feeds data to CPUs faster
  • 2V operation reduces power draw per module
  • Validated for Dell PowerEdge R740xd2 systems

Caratteristiche tecniche

BrandSAMSUNG
SeriesServer Memory
ModelM393A4K40CB2-CTD
Capacity32GB
Type288-Pin DDR4 SDRAM
SpeedDDR4 2666 (PC4 21300)
CAS LatencyCL19
Voltage1.20V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
ChipsetSamsung Chipset
Compatible SystemDell
FeaturesDell SNPTN78YC/32G A9781929 Server PowerEdge R740xd2

Domande su questo articolo

Will the 288-pin DDR4 form factor fit the memory slots in a Dell PowerEdge R740xd2?

Yes, the 288-pin DDR4 RDIMM matches the slot design used in the PowerEdge R740xd2 server platform.

Do I need to populate specific channels or follow a ranked order when installing this 2Rx4 registered module?

Install modules in the channel sequence recommended by the Dell service manual for the R740xd2; the common mistake is skipping the primary channel or mixing ranks within a channel.

How do I know when this 32GB ECC RDIMM should be replaced in a production server?

Replace the module if the system logs uncorrectable ECC errors, reports a memory failure during POST, or shows degraded performance under sustained load.

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