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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

  • Total capacity12 GB
  • Rated speedDDR3 1600 (PC3 12800)
  • CAS latencyCL11
  • Buffer typeUnbuffered

Capacity 12GB

  • 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.

How it compares

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

Price $45.99
Cheaper than about 79% of the 21,161 comparable items (median $397.99).
Total capacity 12 GB
Lower than about 75% of the 20,941 comparable items (median 32 GB).
Price per GB $3.83 per GB
Cheaper than about 85% of the 20,941 comparable items (median $8.19 per GB).

New to this? Buying memory and SSDs with crypto — what to check, what it costs to pay, and what is never asked for.

Specifications

Product
Total capacity12 GB
Performance
Rated speedDDR3 1600 (PC3 12800)
Memory
CAS latencyCL11
ECC supportNo
Buffer typeUnbuffered

Other versions of this model

2 more in the same range

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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