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Green circuit board with black memory chips and gold edge connectors

OWC

OWC 128GB DDR4 2933 PC4-23400 CL21 4Rx4 288-pin 1.2V ECC LRDIMM memory upgrade

SKU CH-EM2S-3Q78C

Single 128GB DDR4 2933 ECC load-reduced DIMM for Dell PowerEdge XR4510c and XR4520c servers

  • Capacity128GB
  • Type288-Pin DDR4 ECC LRDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 128GB

  • Massive 128GB capacity in a single module
  • ECC load-reduced design protects data integrity in servers
  • Runs at 2933MHz CL21 with 1.2V efficiency
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • Backward compatible with 2133, 2400 and 2666MHz systems

OWC 128GB DDR4 ECC LRDIMM

This OWC module provides a single 128GB DDR4 2933 PC4-23400 CL21 4Rx4 288-pin 1.2V ECC Load Reduced DIMM. It is built for Dell PowerEdge XR4510c and XR4520c servers and workstations that require registered ECC memory. The module is JEDEC-standard and ROHS compliant for a warranty-safe upgrade.

Load Reduced DDR4 interface limits

Load Reduced DIMMs reduce electrical load on the memory bus to allow higher densities per channel. They cannot be mixed with unbuffered or standard registered ECC modules in the same system. The DDR4 2933 interface also runs at 2133, 2400 and 2666 MHz when the platform requires a lower speed.

Replaces lower-capacity LRDIMMs

This 128GB module replaces smaller Load Reduced DIMMs to increase total memory without adding slots. The upgrade is worthwhile when the server workload needs more capacity per channel and the platform supports 4Rx4 LRDIMMs at DDR4 2933. It is not for desktop PCs or systems that use unbuffered or standard registered memory.

Privalumai

  • Massive 128GB capacity in a single module
  • ECC load-reduced design protects data integrity in servers
  • Runs at 2933MHz CL21 with 1.2V efficiency
  • JEDEC and RoHS compliant for warranty-safe upgrades
  • Backward compatible with 2133, 2400 and 2666MHz systems

Specifikacijos

BrandOWC
Part Number2L9D44R4128G
Capacity128GB
Type288-Pin DDR4 ECC LRDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredLoad Reduced
Rank4Rx4
Heat SpreaderNo
Compatible SystemDell PowerEdge XR4510c
Dell PowerEdge XR4520c

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Should I pick the 128GB module or add smaller DIMMs to reach the same total?

This single 128GB LRDIMM delivers the full capacity in one slot, leaving remaining slots free for future expansion while keeping the memory channel balanced.

What does the PC4-23400 rating mean once the module is installed in a PowerEdge XR4510c or XR4520c?

The module runs at 2933 MT/s with CL21 latency at 1.2 V; the server’s memory controller will operate it at that speed or down-clock to 2666, 2400 or 2133 MT/s if the platform requires it.

The spec says ECC Load Reduced — what interface does that use and what does it limit?

It uses the standard 288-pin DDR4 LRDIMM interface; the load-reduced buffer reduces electrical load on the memory bus, allowing higher per-slot density, but it cannot be mixed with unbuffered or registered ECC DIMMs.

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