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Green circuit board with gold edge contacts and black memory chips

OWC

OWC 16GB DDR4 2933MHz ECC RDIMM Lenovo ThinkSystem ST550

SKU CH-495X-MAK66

16 GB DDR4-2933 ECC registered DIMM for Lenovo ThinkSystem ST550 servers

  • Capacity16GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2933 (PC4 23400)
  • CAS LatencyCL21
  • Voltage1.2V
  • ECCYes

Capacity 16GB

  • 16GB DDR4 ECC RDIMM adds registered server capacity
  • 2933MHz CL21 speed handles demanding workloads reliably
  • 2V operation reduces power draw in Lenovo ST550
  • Backward compatible with 2133, 2400 and 2666MHz systems
  • Replaces Lenovo part numbers 01AG631, 4ZC7A08708 and 4ZC7A08741

16GB DDR4 ECC RDIMM for ST550

This 16GB DDR4 2933MHz module is built for the Lenovo ThinkSystem ST550 server platform. It carries ECC and registered buffering to meet the reliability demands of Xeon SP Gen 2 workstations and rack servers. The 2Rx8 organisation and 1.2V operation follow standard DDR4 server specifications.

Sustained load behaviour

ECC circuitry corrects single-bit errors on the fly while the register reduces electrical load on the memory controller during continuous operation. At CL21 latency and PC4-23400 throughput the module maintains stability across 2133MHz, 2400MHz and 2666MHz backward-compatible speeds. No heat spreader is fitted, so airflow in the ST550 chassis handles thermal management.

Upgrade context

The DIMM replaces Lenovo part numbers 01AG631, 4ZC7A08708 and 4ZC7A08741 when expanding or refreshing ST550 memory. It will not work in standard desktop boards or alongside unbuffered modules. Buyers who need consumer DDR4 or non-ECC memory should look elsewhere.

Puntos fuertes

  • 16GB DDR4 ECC RDIMM adds registered server capacity
  • 2933MHz CL21 speed handles demanding workloads reliably
  • 2V operation reduces power draw in Lenovo ST550
  • Backward compatible with 2133, 2400 and 2666MHz systems
  • Replaces Lenovo part numbers 01AG631, 4ZC7A08708 and 4ZC7A08741

Especificaciones

BrandOWC
Part Number2R9D42R816GB
Capacity16GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2933 (PC4 23400)
CAS LatencyCL21
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx8
Heat SpreaderNo
Compatible SystemLenovo ThinkSystem (Xeon SP Gen 2) ST550

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Preguntas sobre este artículo

How much power does the 1.2V DDR4 module draw when the ST550 runs continuously?

The module operates at 1.2V DDR4 standard voltage; registered ECC RDIMMs at this voltage typically draw only a few watts per stick under sustained load, keeping heat output low in the ST550 chassis.

What must the Lenovo ThinkSystem ST550 already have for this 288-pin RDIMM to work?

The ST550 must support DDR4 288-pin ECC registered memory and run a Xeon Scalable Gen 2 processor; unbuffered or non-ECC DIMMs cannot be mixed with this module.

Will this 2933MHz CL21 stick run with older 2133MHz or 2400MHz modules I keep in the ST550?

Yes, the module is backward compatible with 2133MHz, 2400MHz and 2666MHz speeds; the system will clock all installed DIMMs to the lowest common speed.

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