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Four green 240-pin DDR3L ECC registered DIMMs in a row

OWC

OWC 32GB (4x8GB) DDR3L 1600 CL11 1.35V ECC RDIMM Kit

SKU CH-NNWZ-4Y6WQ

32GB DDR3L 1600 ECC registered kit for Lenovo System x3300 M4, x3500 M4, x3530 M4, x3550 M4 and x3630 M4 servers

  • Capacity32GB (4 x 8GB)
  • Type240-Pin DDR3L ECC RDIMM
  • SpeedDDR3L 1600 (PC3L 12800)
  • CAS LatencyCL11
  • Voltage1.35V
  • ECCYes

Capacity 32GB (4 x 8GB)

  • ECC registered design protects data integrity in servers
  • 32 GB kit with four 8 GB modules expands capacity
  • DDR3L 1600 CL11 at 1.35 V lowers power draw
  • 240-pin RDIMM fits Lenovo System x3300 M4 through x3630 M4
  • Replaces Lenovo part numbers 00D5035, 00D5036, 46W0700, 46W0771

Targeted Server Upgrade

This 32 GB kit contains four 8 GB DDR3L 1600 CL11 modules built for Lenovo System x3300 M4, x3500 M4, x3530 M4, x3550 M4 and x3630 M4 servers. It is not compatible with standard desktop computers and cannot be mixed with unbuffered memory. Buyers who need memory for consumer motherboards or non-Lenovo platforms should look elsewhere.

Registered ECC Construction

Each module uses a 240-pin RDIMM form factor with 1Rx4 organisation and on-board ECC registration for data integrity in multi-socket workloads. The low-profile design has no heat spreader, so it fits dense DIMM arrays without clearance issues. Installers must populate all four slots as a matched set to maintain registered timing across the channel.

Low-Voltage Thermal Profile

Operating at 1.35 V, the DDR3L modules draw less power and generate less heat than standard 1.5 V DDR3 at the same 1600 MT/s speed. This reduces cooling demand in rack chassis and helps keep fan speeds lower during sustained compute tasks. Systems without DDR3L voltage support will not boot with this kit.

Highlights

  • ECC registered design protects data integrity in servers
  • 32 GB kit with four 8 GB modules expands capacity
  • DDR3L 1600 CL11 at 1.35 V lowers power draw
  • 240-pin RDIMM fits Lenovo System x3300 M4 through x3630 M4
  • Replaces Lenovo part numbers 00D5035, 00D5036, 46W0700, 46W0771

Specifications

BrandOWC
Part Number1R6T31R4032S
Capacity32GB (4 x 8GB)
Type240-Pin DDR3L ECC RDIMM
SpeedDDR3L 1600 (PC3L 12800)
CAS LatencyCL11
Voltage1.35V
ECCYes
Buffered/RegisteredRegistered
Rank1Rx4
Heat SpreaderNo
Compatible SystemLenovo System x3300 M4
Lenovo System x3500 M4
Lenovo System x3530 M4
Lenovo System x3550 M4
Lenovo System x3630 M4

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Questions about this item

What DDR3L speed and CAS latency does this kit run at?

The kit runs at DDR3L 1600 (PC3L-12800) with a CAS latency of CL11.

What physical slot and pin count does this memory use?

Each module is a 240-pin DDR3L RDIMM that fits standard 240-pin DIMM slots.

How do I install the four 8 GB modules in a Lenovo System x3550 M4?

Populate all four modules in matched channel pairs following the server's DIMM population guide; the common mistake is mixing these registered DIMMs with unbuffered memory, which will prevent boot.

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