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Green circuit board with black memory chips and gold edge connector

Crucial

Crucial CT4G3S1339M 4GB DDR3 1333 SO-DIMM memory upgrade

SKU CH-V941-62DDG MPN CT4G3S1339M

4GB DDR3 1333 SO-DIMM for Mac notebooks, tested to meet Apple quality requirements

  • Total capacity4 GB
  • Rated speedDDR3 1333 (PC3 10600)
  • CAS latency9
  • Rated voltage1.35 V/1.5 V
  • Product type204-Pin DDR3 SO-DIMM
  • Compatible withFor Apple Notebook
  • Boosts Mac responsiveness with 4 GB DDR3 1333 MT/s
  • Low 1.35 V / 1.5 V voltage cuts power draw
  • CL9 latency keeps data flowing smoothly
  • 204-pin SO-DIMM fits Apple notebook slots directly
  • Component- and module-level testing meets Apple quality standards

Mac Memory Upgrade

This 4 GB DDR3 SO-DIMM is built for Apple notebooks that accept 204-pin modules at 1333 MT/s. It installs without tools and meets the voltage and timing specifications those systems expect.

Buyer Fit

Suits owners of compatible Mac laptops who need a single 4 GB stick to replace a failed module or fill an empty slot. Not for machines that require a different pin count, voltage range, or memory generation than the one specified here.

Deciding Spec

The module runs at DDR3 1333 (PC3-10600) with CAS latency 9 and dual-voltage 1.35 V/1.5 V operation; if your Mac calls for that exact speed and timing, this part will work.

How it compares

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

Price $33.99
Cheaper than about 83% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB
Lower than about 90% of the 20,941 comparable items (median 32 GB).
CAS latency 9
Lower than about 92% of the 483 comparable items (median 22).
Price per GB $8.50 per GB
Typical for this category: the median of 20,941 items is $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 nameCT4G3S1339M
Total capacity4 GB
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
Memory
CAS latency9
Power
Rated voltage1.35 V/1.5 V
Size & build
Shipping weight0.05 kg
Package size168 × 117 × 10 mm
Compatibility
Compatible withFor Apple Notebook

Questions about this item

What does the DDR3 1333 rating mean for real-world performance in my Mac?

The module runs at 1333 MT/s with CL9 latency, giving the memory controller its rated bandwidth for everyday workloads.

How does the PC3-10600 designation limit usable speed?

PC3-10600 certifies operation at DDR3 1333; the Mac's memory controller will not exceed this data rate.

Will the 204-pin SO-DIMM fit my notebook's memory slot?

Yes, the 204-pin DDR3 SO-DIMM form factor matches the slot used by compatible Apple notebooks.

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