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Two green 288-pin DDR4 ECC LRDIMM modules with black chips, no heat spreader

OWC

OWC 256GB (2x128GB) DDR4 2933 CL21 ECC LRDIMM memory upgrade

SKU CH-5MEP-N2ZD4

A 256 GB DDR4 ECC LRDIMM kit (2 × 128 GB) at 2933 MHz CL21 for Dell PowerEdge R740, R740XD, R940 and T640 servers

  • Capacity256GB (2 x 128GB)
  • Type288-Pin DDR4 ECC LRDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 256GB (2 x 128GB)

  • ECC load-reduced design protects data integrity in Dell PowerEdge servers
  • 256 GB kit (2 × 128 GB modules) expands memory capacity for virtualisation workloads
  • 2933 MHz DDR4 speed with CL21 latency delivers responsive server performance
  • 2 V operation reduces power draw while maintaining stability
  • Backward compatible with 2133, 2400 and 2666 MHz systems for flexible deployment

Server-grade ECC LRDIMM kit

This OWC kit supplies 256 GB of DDR4 memory in two 128 GB load-reduced DIMMs. Each module runs at 2933 MT/s with CL21 latency at 1.2 V and carries ECC protection. The 288-pin form factor and 8Rx4 organisation are built for registered server platforms only.

Suits Dell PowerEdge R740, R740XD, R940 and T640

These modules are validated for the listed Dell PowerEdge servers and will not work in standard desktop boards. They cannot be mixed with unbuffered or registered ECC DIMMs, so builders upgrading other platforms or mixing memory types should look elsewhere.

Fills two DIMM slots in compatible Dell servers

The kit plugs directly into 288-pin DDR4 slots on the supported PowerEdge models. Backward compatibility with 2133, 2400 and 2666 MT/s speeds lets the memory clock down if the system requires it. No heat spreader is fitted, leaving clearance for dense slot populations.

Puntos fuertes

  • ECC load-reduced design protects data integrity in Dell PowerEdge servers
  • 256 GB kit (2 × 128 GB modules) expands memory capacity for virtualisation workloads
  • 2933 MHz DDR4 speed with CL21 latency delivers responsive server performance
  • 2 V operation reduces power draw while maintaining stability
  • Backward compatible with 2133, 2400 and 2666 MHz systems for flexible deployment

Especificaciones

BrandOWC
Part Number2L9D48R4256P
Capacity256GB (2 x 128GB)
Type288-Pin DDR4 ECC LRDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredLoad Reduced
Rank8Rx4
Heat SpreaderNo
Compatible SystemDell PowerEdge R740
Dell PowerEdge R740XD
Dell PowerEdge R940
Dell PowerEdge T640

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Preguntas sobre este artículo

Which server models must I already own for this 256 GB DDR4 2933 ECC LRDIMM kit to be compatible?

This kit is validated for Dell PowerEdge R740, R740XD, R940 and T640 servers.

Can I keep my existing DDR4 2133, 2400 or 2666 modules installed alongside these 2933 CL21 LRDIMMs?

The modules are backward-compatible with 2133 MHz, 2400 MHz and 2666 MHz speeds, but LRDIMMs cannot be mixed with unbuffered or registered ECC DIMMs.

How do I confirm the 2x128 GB 8Rx4 modules are running at 2933 MT/s with ECC active after installation?

Check the server BIOS or iDRAC memory configuration screen; it should report 256 GB total, 2933 MT/s speed and ECC Load Reduced status.

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