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Four green 240-pin DDR3 ECC registered DIMMs

OWC

OWC 32GB (4x8GB) DDR3 1333 ECC Registered RDIMM Kit

SKU CH-BENY-J0TS4

32 GB DDR3 1333 ECC registered RDIMM kit of four 8 GB modules for Lenovo System x3950 X5 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)

  • ECC registered design prevents data corruption in critical workloads
  • 32 GB kit (4 × 8 GB) expands server memory capacity
  • DDR3 1333 MHz CL9 matches Lenovo x3950 X5 specifications
  • 5 V 240-pin RDIMM fits workstation and server slots
  • Replaces nine Lenovo part numbers for direct compatibility

32 GB ECC Registered Kit for Lenovo System x3950 X5

This OWC upgrade kit supplies 32 GB of DDR3 1333 memory across four 8 GB registered DIMMs. It is built for the Lenovo System x3950 X5 and other workstation or server platforms that require ECC registered modules. The kit replaces a range of Lenovo part numbers and cannot be used in standard desktop computers or mixed with unbuffered memory.

Thermals noise and power draw at 1.5 V

Each module operates at the standard DDR3 voltage of 1.5 V with CL9 latency. Registered buffering and ECC circuitry add minimal overhead while providing error correction for continuous server workloads. No heat spreader is fitted so airflow through the chassis determines module temperature. Power consumption scales with the 1333 MT/s data rate and the four-module population.

Build fit 240 pin DDR3 slots

The 240 pin form factor fits DDR3 DIMM sockets on qualified server and workstation boards. Registered signalling demands a compatible memory controller so the platform must support registered DIMMs. Four modules fill four slots and leave any remaining slots free for further registered expansion. The kit will not function in systems that only accept unbuffered or non ECC memory.

How it compares

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

Price $79.99
Cheaper than about 70% 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 $2.50 per GB
Cheaper than about 92% 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 x3950 X5

Other versions of this model

5 more in the same range

Questions about this item

How do I install these 240-pin DDR3 RDIMMs in a Lenovo System x3950 X5, and what step is often missed?

Power down the server, open the chassis, and insert each 8 GB module into the correct DIMM slots following the x3950 X5 population rules; the step most often missed is verifying the BIOS recognises all 32 GB at 1333 MHz with ECC active before closing the case.

What maintenance or replacement will this 4×8 GB ECC registered kit need over time?

The modules themselves require no scheduled maintenance; replacement is only needed if a DIMM fails ECC scrubbing or the server’s memory controller logs uncorrectable errors, at which point the single faulty 8 GB stick can be swapped.

What limit appears first when this DDR3-1333 CL9 registered memory runs under sustained load?

The 1333 MT/s data rate and CL9 latency set the bandwidth ceiling, so throughput saturates before the 1.5 V supply or the registered buffer becomes a bottleneck.

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