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Four black 240-pin DDR3 DIMMs with silver heat spreaders

OWC

OWC 128GB 4×32GB DDR3 1333 PC3 10600 ECC Registered DIMM 240-pin

SKU CH-WD9V-HZJF2

128 GB quad-channel kit of DDR3 1333 ECC registered DIMMs for 2013 Mac Pro models

  • Total capacity128 GB (4 × 32 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • CAS latencyCL9
  • Buffer typeRegistered

Capacity 128GB (4 x 32GB)

  • 128 GB total capacity from four 32 GB modules
  • DDR3 1333 MHz PC3 10600 speed for 2013 Mac Pro
  • ECC registered design prevents mixing with unbuffered memory
  • CL9 CAS latency at 1.5 V operating voltage
  • 240-pin DIMM form factor fits Mac Pro 6,1 slots

128 GB kit for 2013 Mac Pro

This 128 GB kit contains four 32 GB DDR3 1333 modules built to the PC3 10600 standard. Each stick is ECC registered with a CAS latency of CL9 and runs at 1.5 V. The memory is designed specifically for the 2013 Mac Pro lineup and is not compatible with standard desktop PCs.

Registered ECC requirement and slot layout

The modules use a 240-pin DIMM form factor and require a system that accepts registered ECC memory. They cannot be mixed with unbuffered ECC modules; all installed memory must be of the same registered type. The kit fills four slots, leaving any remaining slots free for additional registered modules if the workstation supports them.

Sustained operation with registered buffering

Registered buffering reduces electrical load on the memory controller during continuous workloads, helping maintain signal integrity over long rendering or compute sessions. ECC protection corrects single-bit errors in real time, preventing data corruption during extended use. The CL9 latency and 1333 MHz speed deliver consistent throughput for the supported Mac Pro models.

How it compares

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

Price $363.99
Typical for this category: the median of 21,161 items is $397.99.
Total capacity 128 GB (4 × 32 GB)
Higher than about 70% of the 20,941 comparable items (median 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
Total capacity128 GB (4 × 32 GB)
Performance
Rated speedDDR3 1333 (PC3 10600)
Memory
CAS latencyCL9
ECC supportYes
Buffer typeRegistered

Other versions of this model

2 more in the same range

Questions about this item

Will the 1333 MHz DDR3 CL9 timing become the bottleneck during sustained heavy workloads?

The kit runs at DDR3 1333 with CL9 latency; that speed and timing set the maximum sustained bandwidth the memory can deliver.

Does the 1.5 V registered ECC design run hotter or louder than standard unbuffered modules?

Registered ECC DIMMs draw slightly more power at 1.5 V, but they have no active cooling so noise stays at system-fan level and heat is comparable to other DDR3 DIMMs.

Must the 2013 Mac Pro already have registered ECC memory installed for this 4 × 32 GB kit to work?

The Mac Pro 6,1 requires all installed DIMMs to be the same type; if any unbuffered ECC modules are present they must be removed before adding this registered ECC kit.

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