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Four green 288-pin DDR4 LRDIMM modules with black chips, no heat spreaders

OWC

OWC 512GB (4x128GB) DDR4 2933 CL21 ECC LRDIMM Kit

SKU CH-23Z6-AMDFA

ECC load-reduced DDR4 kit totalling 512 GB across four 128 GB modules at 2933 MHz CL21 for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 servers

  • Capacity512GB (4 x 128GB)
  • Type288-Pin DDR4 ECC LRDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 512GB (4 x 128GB)

Voir les 2 autres configurations
  • 512GB total capacity from four 128GB modules for large server workloads
  • DDR4 2933 speed with CL21 latency for responsive data handling
  • ECC load-reduced design protects data integrity in critical environments
  • 2V operation reduces power draw across Cisco UCS platforms
  • Backward compatible with 2133, 2400 and 2666MHz systems for flexible deployment

Server-grade ECC LRDIMM kit

This OWC kit supplies 512 GB of DDR4 2933 memory across four 128 GB LRDIMM modules. Each stick is a 288-pin ECC load-reduced DIMM rated at CL21 and 1.2 V. The kit is validated for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5 servers and workstations. It will not work in standard desktop platforms or alongside unbuffered or registered ECC memory.

Sustained-load behaviour

Load-reduced buffering lowers electrical load on the memory bus, allowing all four ranks per module to remain stable during extended compute sessions. The modules operate at the full 2933 MT/s data rate with CL21 timing, and they will down-clock to 2666, 2400 or 2133 MT/s if the platform requires it. ECC correction runs continuously, protecting data integrity throughout long-running workloads.

Thermals, noise and power

Bare modules without heat spreaders rely on chassis airflow for cooling, adding no acoustic signature of their own. At 1.2 V the kit draws minimal power per DIMM, keeping thermal contribution low inside dense Cisco UCS enclosures. The design targets quiet, efficient operation in rackmount and blade environments where airflow is managed by the system fans.

Points forts

  • 512GB total capacity from four 128GB modules for large server workloads
  • DDR4 2933 speed with CL21 latency for responsive data handling
  • ECC load-reduced design protects data integrity in critical environments
  • 2V operation reduces power draw across Cisco UCS platforms
  • Backward compatible with 2133, 2400 and 2666MHz systems for flexible deployment

Caractéristiques

BrandOWC
Part Number2L9D44R4512S
Capacity512GB (4 x 128GB)
Type288-Pin DDR4 ECC LRDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredLoad Reduced
Rank4Rx4
Heat SpreaderNo
Compatible SystemCisco UCS B200 M5
Cisco UCS B480 M5
Cisco UCS C220 M5
Cisco UCS C240 M5
Cisco UCS C480 M5

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Questions sur cet article

How much power does the 1.2 V DDR4 2933 kit draw when the server runs continuously?

Each 128 GB module operates at 1.2 V; total system draw depends on the Cisco UCS platform and workload, not on the modules alone.

What server models must I already own for this 4Rx4 ECC LRDIMM kit to work?

The kit is validated for Cisco UCS B200 M5, B480 M5, C220 M5, C240 M5 and C480 M5; it will not function in standard desktops or other platforms.

Can I mix these 2933 MHz CL21 LRDIMMs with the 2133 MHz or 2400 MHz modules already in my Cisco UCS?

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

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