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Two green DDR3 ECC RDIMM modules with gold contacts

OWC

OWC 32GB (2x16GB) DDR3 1333 ECC RDIMM memory upgrade

SKU CH-DM6W-MQARJ

32 GB dual-channel DDR3-1333 ECC registered kit for Lenovo System x3550 M3, x3620 M3, x3630 M3, x3650 M3 and x3850 X5 servers

  • Capacity32GB (2 x 16GB)
  • Type240-Pin DDR3 ECC RDIMM
  • SpeedDDR3 1333 (PC3 10600)
  • CAS LatencyCL9
  • Voltage1.5V
  • ECCYes

Capacity 32GB (2 x 16GB)

  • ECC registered design protects data integrity in Lenovo System x servers
  • 32 GB kit (2 × 16 GB) expands capacity for virtualization workloads
  • DDR3 1333 CL9 matches OEM speed for drop-in compatibility
  • 5 V 240-pin RDIMM fits x3550 M3, x3620 M3, x3630 M3, x3650 M3 and x3850 X5
  • Replaces Lenovo part numbers 03X3813 and 0A89413 for validated upgrade path

Lenovo Server ECC RDIMM Kit

This 32GB kit contains two 16GB DDR3 1333 ECC registered DIMMs built for Lenovo System x3550 M3, x3620 M3, x3630 M3, x3650 M3 and x3850 X5 servers. It replaces Lenovo part numbers 03X3813 and 0A89413 and runs at 1.5V with CL9 latency.

Registered ECC Compatibility Constraint

Registered ECC modules will not work in standard desktop boards and cannot be mixed with unbuffered memory. The 240-pin DDR3 interface limits use to platforms that explicitly support registered error-correcting DIMMs at this speed and voltage.

2Rx4 Rank Determines Slot Population

Each 16GB module uses a dual-rank 2Rx4 organisation, which affects how many DIMMs the memory controller can address per channel. Buyers needing single-rank modules or higher capacities per slot should verify the server's qualified vendor list before ordering.

Highlights

  • ECC registered design protects data integrity in Lenovo System x servers
  • 32 GB kit (2 × 16 GB) expands capacity for virtualization workloads
  • DDR3 1333 CL9 matches OEM speed for drop-in compatibility
  • 5 V 240-pin RDIMM fits x3550 M3, x3620 M3, x3630 M3, x3650 M3 and x3850 X5
  • Replaces Lenovo part numbers 03X3813 and 0A89413 for validated upgrade path

Specifications

BrandOWC
Part Number1R3D32R4032P
Capacity32GB (2 x 16GB)
Type240-Pin DDR3 ECC RDIMM
SpeedDDR3 1333 (PC3 10600)
CAS LatencyCL9
Voltage1.5V
ECCYes
Buffered/RegisteredRegistered
Rank2Rx4
Heat SpreaderNo
Compatible SystemLenovo System x3550 M3
Lenovo System x3620 M3
Lenovo System x3630 M3
Lenovo System x3650 M3
Lenovo System x3850 X5

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Questions about this item

Should I choose the 32GB kit with two 16GB modules or look for a different capacity?

This kit provides 32GB using two 16GB DDR3 1333 ECC registered DIMMs. It is built for the Lenovo System x3550 M3, x3620 M3, x3630 M3, x3650 M3 and x3850 X5. Other capacities would require a different part number.

What does the 1333 speed rating actually deliver inside a compatible server?

The modules run at DDR3 1333 (PC3-10600) with CL9 latency at 1.5V. In the listed Lenovo systems they operate at the platform's supported DDR3 1333 rate, providing error-correcting registered memory for stable server workloads.

How does the 240-pin DDR3 ECC registered interface limit what I can install alongside it?

These 240-pin DDR3 ECC registered DIMMs must not be mixed with unbuffered memory. They only fit servers that support registered DDR3 ECC, such as the listed Lenovo System x models, and require matching registered modules for proper operation.

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