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Green rectangular DDR4 ECC registered DIMM with black chips on both sides, 288 gold pins along bottom edge

OWC

OWC 128GB DDR4 2933MHz CL21 ECC Registered 288pin DIMM for Lenovo ThinkSystem SR650 SR950

SKU CH-J8Y0-FWDPT

128GB DDR4 2933MHz ECC registered DIMM for Lenovo ThinkSystem SR650 and SR950 servers

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

Capacity 128GB

  • 128GB capacity supports large datasets and virtualization workloads
  • DDR4 2933MHz speed delivers high throughput for server applications
  • ECC registered design detects and corrects data errors automatically
  • 2V operation reduces power draw in dense memory configurations
  • Validated for Lenovo ThinkSystem SR650 and SR950 Xeon SP Gen 2 platforms

Server-grade capacity for ThinkSystem SR650

This 128GB DDR4 2933MHz CL21 ECC Registered DIMM is built for Lenovo ThinkSystem servers running Xeon SP Gen 2 processors. The 288-pin module delivers 128GB in a single slot using a 4Rx4 organisation, allowing dense memory configurations in the SR650 and SR950 platforms. It operates at the standard 1.2V and meets JEDEC PC4-23400 specifications for registered server memory.

Steady throughput under continuous server workloads

Registered buffering and on-die ECC keep data integrity intact during sustained compute tasks such as virtualisation, database processing and large-scale analytics. The module runs at its rated 2933MHz speed and will also operate at 2133MHz, 2400MHz or 2666MHz when the platform requires a lower frequency, maintaining stability without down-clocking errors. CL21 latency supports consistent response times across all ranks during extended operation.

Low-voltage operation reduces thermal load

At 1.2V the DIMM draws minimal power, helping the server's cooling system maintain lower temperatures even when all memory slots are populated. The absence of a heat spreader keeps the module profile slim for unrestricted airflow between adjacent DIMMs. Quiet, reliable operation is maintained in both the SR650 and SR950 chassis under normal production loads.

Puntos fuertes

  • 128GB capacity supports large datasets and virtualization workloads
  • DDR4 2933MHz speed delivers high throughput for server applications
  • ECC registered design detects and corrects data errors automatically
  • 2V operation reduces power draw in dense memory configurations
  • Validated for Lenovo ThinkSystem SR650 and SR950 Xeon SP Gen 2 platforms

Especificaciones

BrandOWC
Part Number2R9D44R4128G
Capacity128GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank4Rx4
Heat SpreaderNo
Compatible SystemLenovo ThinkSystem (Xeon SP Gen 2) SR650
Lenovo ThinkSystem (Xeon SP Gen 2) SR950

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Preguntas sobre este artículo

How much heat and power will the 1.2V 2933MHz DDR4 ECC RDIMM generate during continuous server operation?

The module runs at 1.2V with JEDEC-standard DDR4 signalling, so power draw and thermal output match typical 288-pin registered DIMMs at this voltage and speed. No heat spreader is fitted, relying on chassis airflow.

What must the system already provide for this 288-pin ECC Registered DDR4 DIMM to function?

A Lenovo ThinkSystem SR650 or SR950 with Xeon SP Gen 2 processors, DDR4 RDIMM slots supporting 2933MHz (PC4-23400) operation, and a BIOS that enables ECC registered memory.

Will this 128GB 4Rx4 CL21 module work alongside existing 2133MHz, 2400MHz or 2666MHz DDR4 RDIMMs in the same server?

Yes — the DIMM is backward compatible with 2133MHz, 2400MHz and 2666MHz speeds. All installed modules will run at the lowest common speed and must be ECC registered; mixing with unbuffered DIMMs is not supported.

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