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Two green DDR3L SO-DIMM sticks with gold contacts, 4GB and 8GB modules

OWC

OWC OWC1600DDR3S12S 12GB (8GB+4GB) DDR3L 1600MHz SODIMM memory upgrade

SKU CH-S31Z-P7YGD MPN OWC1600DDR3S12S

A 12 GB DDR3L 1600 MHz SO-DIMM kit with one 8 GB and one 4 GB module for compatible laptops, mini PCs or NAS systems

  • Capacity12GB
  • SpeedDDR3 1600 (PC3 12800)
  • CAS LatencyCL11
  • ECCNo
  • Buffered/RegisteredUnbuffered

Capacity 12GB

Struck-through versions exist but are not stocked here.

  • 12 GB kit boosts multitasking headroom with matched 8 GB + 4 GB modules
  • 1600 MHz DDR3L speed keeps data flowing for everyday workloads
  • CL11 latency reduces wait cycles for snappier response
  • 35 V low-voltage operation cuts power draw and heat
  • 204-pin SO-DIMM form factor fits 2012 MacBook Pro 13" and 15" models

Kit contents and intended use

This kit combines an 8.0GB module and a 4.0GB module for a total of 12.0GB of DDR3L memory. It is built for owners of the 2012 MacBook Pro 13-inch and 15-inch models who want to reach the maximum supported capacity.

Compatibility checks before ordering

Verify that your system accepts DDR3L SO-DIMMs running at 1.35V with a 204-pin interface. The modules are unbuffered, non-ECC and rated CL11 at 1600MHz. Confirm the laptop has two free slots or that you are replacing the existing pair.

Build quality and daily implications

Each stick uses a low-noise 8-layer PCB and meets JEDEC standards. The 204-pin edge connector fits the SO-DIMM sockets in the target MacBook Pro models. Operating temperature is rated from 0C to 85C, so normal notebook workloads stay well within limits.

Highlights

  • 12 GB kit boosts multitasking headroom with matched 8 GB + 4 GB modules
  • 1600 MHz DDR3L speed keeps data flowing for everyday workloads
  • CL11 latency reduces wait cycles for snappier response
  • 35 V low-voltage operation cuts power draw and heat
  • 204-pin SO-DIMM form factor fits 2012 MacBook Pro 13" and 15" models

Specifications

Capacity12GB
SpeedDDR3 1600 (PC3 12800)
CAS LatencyCL11
ECCNo
Buffered/RegisteredUnbuffered

Other versions of this model

2 more in the same range

Same family, different memory, cooler or clock — compare before you commit.

Questions about this item

Does the kit include both the 8GB and 4GB SODIMMs or must I buy them separately?

The upgrade kit ships with one 8GB module and one 4GB module for a total of 12GB; nothing else is required for installation.

Should I choose the 12GB kit or a single 8GB stick for my 2012 MacBook Pro?

The 12GB kit (8GB + 4GB) fills both slots and reaches the maximum supported capacity, while a single 8GB stick leaves one slot empty and limits total memory to 8GB.

What does the 1600MHz CL11 rating mean once the modules are installed in a 2012 MacBook Pro?

The memory runs at DDR3L 1600MHz with CAS latency 11 at 1.35V, matching the notebook's native memory controller specification.

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