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Four green circuit boards with black chips, 204-pin SODIMM form factor

A-Tech

A-Tech 32GB (4x8GB) DDR3 1333MHz SODIMM 204-Pin memory upgrade for iMac Mid 2010 Mid 2011

SKU CH-3XPM-AYSQV

A 32 GB DDR3 1333 MHz kit of four 204-pin SODIMM modules for iMac 21.5-inch and 27-inch models from 2010 and 2011

  • Total capacity32 GB (4 × 8 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • Rated voltage1.5 V
  • Buffer typeUnbuffered
  • Memory rank2Rx8
  • 32 GB total capacity across four 8 GB modules
  • DDR3 1333 MHz speed matches iMac Mid 2010 and Mid 2011 specs
  • 204-pin SODIMM form factor fits the iMac memory slots
  • Non-ECC unbuffered design meets Apple system requirements
  • Major-brand chips tested for reliability and lifetime warranty

Compatibility — iMac 21.5 Mid 2011 27 Mid 2010 2011

This 32 GB kit is built for the Apple iMac 21.5-inch Mid 2011, the 27-inch Mid 2011 and the 27-inch Mid 2010 Core i5 and i7 models. It matches the Apple order numbers MC309LL/A, MC812LL/A, MC813LL/A, MC814LL/A, MD063LL/A, MC511LL/A and MC784LL/A and the model identifiers iMac11,3, iMac12,1 and iMac12,2.

Who this suits — who should look elsewhere

Owners of the listed iMacs who need the maximum 32 GB capacity in a four-module kit will use every slot. Builders working on any other Mac, on a Windows laptop or on a desktop that requires a different pin count, voltage or memory generation cannot use this kit.

Deciding specification — DDR3 1333 204-pin SODIMM

The modules are DDR3 1333 MHz PC3-10600 SO-DIMMs with 204 pins, 1.50 V operation, non-ECC unbuffered 2Rx8 organisation. If your system calls for this exact combination the kit will work; if it calls for any other speed, pin layout or voltage you need a different part.

How it compares

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

Price $86.99
Cheaper than about 69% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB (4 × 8 GB)
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $2.72 per GB
Cheaper than about 91% 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 nameA-Tech
Product lineA-Tech DDR3 Apple Mac RAM Memory Upgrades
Total capacity32 GB (4 × 8 GB)
Performance
Rated speedDDR3 1333 (PC3 10600)
Processor
ChipsetMajor Brand Chipset
Memory
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsApple Mac Systems

Questions about this item

Will 1333MHz DDR3 actually run at that speed in my Mid 2011 iMac?

The modules are rated at 1333MHz PC3-10600, and the supported iMac models run DDR3 at that native bus speed, so the memory will operate at its rated frequency.

Does the 204-pin SODIMM interface limit total capacity on these iMacs?

Each slot accepts a 204-pin DDR3 SODIMM; the four slots in the compatible Mid 2010 and Mid 2011 iMacs allow the full 32GB kit (4 x 8GB) to be installed.

Will the 1.50V unbuffered 2Rx8 modules fit the memory bay in a 21.5-inch Mid 2011 iMac?

Yes, the SODIMMs are standard height with no heat spreader and match the 1.50V unbuffered 2Rx8 specification required by the 21.5-inch and 27-inch Mid 2010/2011 iMac models.

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