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Green rectangular DDR4 RDIMM module with gold edge connectors and black memory chips, no heat spreader

OWC

OWC 32GB DDR4 2400MHz CL17 ECC Registered RDIMM 2Rx4 1.2V 288-pin memory upgrade for Lenovo ThinkServer SD350

SKU CH-A01Z-222C2

Adds 32 GB of DDR4 2400 MHz ECC registered memory to Lenovo ThinkServer SD350

  • Capacity32GB
  • Type288-Pin DDR4 ECC RDIMM
  • SpeedDDR4 2400 (PC4 19200)
  • CAS LatencyCL17
  • Voltage1.2V
  • ECCYes
  • 32 GB capacity doubles server memory headroom
  • ECC registered design prevents data corruption in critical workloads
  • DDR4 2400 MHz CL17 speed matches Lenovo ThinkServer SD350 specs
  • 2 V operation reduces power draw and heat output
  • Replaces Lenovo part numbers 46W0832, 46W0833, 46W0835, 4X70G88320, 4X70M09263

32 GB DDR4 ECC Registered DIMM

This 32 GB DDR4 module runs at 2400 MHz with CL17 latency and 1.2 V operation. It uses a 288-pin registered ECC design built for server and workstation platforms. The dual-rank 2Rx4 organisation delivers high density for memory-intensive workloads. It is validated for the Lenovo ThinkServer SD350.

Suits ThinkServer SD350 upgrades

This memory fits administrators expanding a ThinkServer SD350 or replacing failed modules with a direct OEM alternative. It will not work in standard desktop computers or consumer motherboards. It also cannot be mixed with unbuffered non-ECC DIMMs. Buyers needing non-ECC memory for a desktop should look elsewhere.

Registered ECC 2Rx4 organisation

The registered ECC 2Rx4 layout is the single specification that determines compatibility. Only systems designed for registered ECC DDR4 DIMMs can use this module. Mixing it with unbuffered memory will prevent the system from booting. Verify your platform requires registered ECC before purchasing.

Highlights

  • 32 GB capacity doubles server memory headroom
  • ECC registered design prevents data corruption in critical workloads
  • DDR4 2400 MHz CL17 speed matches Lenovo ThinkServer SD350 specs
  • 2 V operation reduces power draw and heat output
  • Replaces Lenovo part numbers 46W0832, 46W0833, 46W0835, 4X70G88320, 4X70M09263

Specifications

BrandOWC
Part Number2R4D42R432GB
Capacity32GB
Type288-Pin DDR4 ECC RDIMM
SpeedDDR4 2400 (PC4 19200)
CAS LatencyCL17
Voltage1.2V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemLenovo ThinkServer SD350

Other versions of this model

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Questions about this item

How do I install the 288-pin DDR4 RDIMM in my ThinkServer SD350 and what step is often missed?

Power off the server, open the chassis, align the module key with the slot notch, press firmly until both latches click, then verify in BIOS that the 32GB module registers at 2400MHz with ECC active — skipping the BIOS check is the step most people miss.

What maintenance or replacement will this ECC registered module need over its service life?

The module itself has no moving parts and requires no scheduled maintenance; replacement is only needed if a correctable error count climbs or a DIMM fails POST, at which point the OWC lifetime advanced-replacement programme covers a swap.

What limit appears first when the RDIMM runs sustained workloads at 2400MHz CL17?

The registered buffer and 1.2V operation keep thermals low, so the first practical limit is the memory controller’s maximum supported capacity per channel — not the module’s own speed or voltage rating.

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