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Four green DDR3 ECC registered DIMMs in anti-static bags

OWC

OWC 32GB (4x8GB) DDR3 1333 ECC Registered RDIMM memory upgrade for Lenovo System x3550 M3 R4 x3650 M2

SKU CH-R74B-QQ5GH

32 GB registered ECC DDR3 kit (four 8 GB modules) at 1333 MHz for Lenovo System x3550 M3 R4 and x3650 M2 servers

  • Total capacity32 GB (4 × 8 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • CAS latencyCL9
  • Rated voltage1.5 V
  • Buffer typeRegistered
  • Memory rank2Rx4

Capacity 32GB (4 x 8GB)

  • 32 GB capacity lets you run larger workloads
  • ECC registered design protects data integrity in servers
  • 1333 MHz DDR3 speed matches system specifications
  • 4 x 8 GB kit fills four slots for balanced channels
  • Replaces nine Lenovo part numbers for easy ordering

Server-Specific ECC RDIMM Kit

This 32GB kit contains four 8GB DDR3 1333 registered ECC modules built for Lenovo System x3550 M3 R4 and x3650 M2 servers. The 240-pin RDIMMs run at 1.5V with CL9 latency and a 2Rx4 organisation. They are designed for workloads that require error-correcting registered memory in compatible enterprise platforms.

Registered ECC Design Impact

Registered buffering and ECC functionality mean these modules only work in systems that explicitly support registered ECC DDR3. They cannot be mixed with unbuffered memory and will not function in standard desktop or consumer workstation boards. The kit replaces a range of Lenovo part numbers including 0A89412, 46C0542 and 46C7449.

DDR3 1333 Registered Requirement

The single specification that decides fitment is DDR3 1333 registered ECC RDIMM in a 240-pin form factor. If the target server calls for unbuffered, non-ECC or a different DDR generation, this kit will not install or operate. Verify the platform requires registered ECC DDR3 before purchase.

How it compares

Measured against everything we stock in Model-Specific Memory Upgrades, at today’s prices. Recalculated every night.

Price $90.99
Cheaper than about 69% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB (4 × 8 GB)
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $2.84 per GB
Cheaper than about 90% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameOWC
Part number1R3D32R4032S
Total capacity32 GB (4 × 8 GB)
Product type240-Pin DDR3 ECC RDIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
Memory
CAS latencyCL9
ECC supportYes
Buffer typeRegistered
Memory rank2Rx4
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsLenovo System x3550 M3 R4
Lenovo System x3650 M2

Other versions of this model

5 more in the same range

Questions about this item

Will the 2Rx4 registered DIMMs need any firmware updates or special handling when I add them to a Lenovo System x3550 M3 R4?

The modules are JEDEC-compliant DDR3 1333 registered ECC DIMMs. Install them in matched sets of four; no firmware update is required beyond the server’s normal BIOS.

What speed ceiling will I hit first if all four channels run at full load continuously?

The kit is rated DDR3 1333 (PC3-10600) CL9 at 1.5 V, so the memory bus itself is the first bottleneck under sustained throughput.

How much extra heat and power should I budget for when the 32 GB kit runs 24/7 in a x3650 M2?

Each 8 GB 2Rx4 module draws standard DDR3 1.5 V power with no heat spreader; total draw stays within the platform’s normal DIMM thermal envelope.

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