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Two green circuit boards with gold edge connectors and black memory chips

Crucial

Crucial CT2K4G3S1067M 8GB (2 x 4GB) DDR3 1066 SO-DIMM memory upgrade

SKU CH-WCZA-39PPG MPN CT2K4G3S1067M

Dual-channel 8 GB DDR3 1066 SO-DIMM kit with 1.35 V operation for compatible Mac notebooks

  • Total capacity8 GB (2 × 4 GB)
  • Rated speedDDR3 1066 (PC3 8500)
  • CAS latency7
  • Rated voltage1.35 V
  • Buffer typeUnbuffered
  • Kit configurationDual Channel kit
  • 8GB dual-channel kit boosts Mac responsiveness
  • DDR3 1066 PC3-8500 CL7 matches factory spec
  • 35V DDR3L operation runs cooler and efficiently
  • 204-pin SO-DIMM fits Apple notebook slots directly
  • Lead-free halogen-free modules tested at component level

Mac notebook DDR3 upgrade kit

This Crucial CT2K4G3S1067M kit supplies two 4 GB DDR3 SO-DIMM modules for a total of 8 GB. Each stick is a 204-pin unbuffered non-ECC unit rated at DDR3 1066 (PC3 8500) with CAS latency 7 and operates at 1.35 V. The kit is built specifically for Apple notebook compatibility.

Who this suits and who should look elsewhere

Owners of compatible Mac notebooks needing a straightforward dual-channel memory increase will find this kit fits and runs at the specified speed. Systems that require registered or ECC modules, a different DDR generation, or a higher frequency than 1066 MT/s cannot use these sticks.

The specification that decides fit

The modules are 204-pin DDR3 SO-DIMMs running at 1.35 V with a PC3 8500 rating; if the notebook demands a different pin count, voltage, or DDR generation the upgrade will not work.

How it compares

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

Price $41.99
Cheaper than about 80% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB (2 × 4 GB)
Lower than about 80% of the 20,941 comparable items (median 32 GB).
CAS latency 7
Lower than about 95% of the 483 comparable items (median 22).
Price per GB $5.25 per GB
Cheaper than about 73% 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
Brand nameCrucial
Model nameCT2K4G3S1067M
Total capacity8 GB (2 × 4 GB)
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1066 (PC3 8500)
Memory
CAS latency7
ECC supportNo
Buffer typeUnbuffered
Kit configurationDual Channel kit
Heat spreaderNo
Power
Rated voltage1.35 V
Size & build
Shipping weight0.06 kg
Package size171 × 122 × 13 mm
Compatibility
Compatible withFor Apple Notebook

Questions about this item

Does the CT2K4G3S1067M kit include both SO-DIMM modules or do I need to buy a second stick separately?

The package contains two 4 GB 204-pin DDR3 SO-DIMMs, giving 8 GB total in a matched dual-channel set.

Should I choose the 1.35 V DDR3L modules or a 1.5 V DDR3 version for my Mac?

These modules run at 1.35 V (DDR3L) and are backwards-compatible with 1.5 V slots, so they are the correct choice for supported Mac notebooks.

What does the PC3-8500 rating mean for actual bandwidth in my laptop?

PC3-8500 indicates a peak transfer rate of 8 500 MB/s at the rated 1 066 MT/s data speed with CAS latency 7.

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