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Four green circuit-board SO-DIMM modules with black chips

Computer Memory Solutions

Computer Memory Solutions CM10246410600SODRH 32GB (4x8GB) DDR3 1333MHz memory upgrade

SKU CH-ZS2W-WZAD5

32 GB kit of four 8 GB DDR3 1333 MHz SO-DIMM modules for the 27-inch 2011 iMac

  • Total capacity32 GB (4 × 8 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL9
  • Memory timings9-9-9
  • Rated voltage1.5 V
  • 32 GB total capacity across four 8 GB modules for full iMac upgrade
  • DDR3 1333 MHz (PC3-10600) speed matches original specification
  • CL9 9-9-9 timing at 1.5 V for stable operation
  • 204-pin non-ECC unbuffered SO-DIMM fits the 27-inch Mid-2011 iMac
  • Manufacturer guarantees compatibility with iMac12,2 A1312 (Mid-2011)

32GB DDR3 1333MHz kit for Mid-2011 iMac

This 32GB kit contains four 8GB DDR3 1333MHz SO-DIMM modules built to the PC3-10600 standard. It is designed specifically for the 27-inch iMac with a 3.4 GHz Core i7 processor released in mid-2011. The unbuffered, non-ECC memory operates at 1.5V with CL9 timing.

Suits owners of the identified iMac model

The kit matches the exact specifications required by the Apple iMac "Core i7" 3.4 27-Inch (Mid-2011), including the 204-pin form factor and 2Rx8 rank structure. Systems that require ECC registered modules, a different pin count, or a voltage other than 1.5V will not be compatible with this memory.

Four-module 204-pin SO-DIMM configuration

The package provides four sticks to fill all four memory slots in the supported iMac, reaching the maximum 32GB capacity. Each module uses major-brand chips in a 2Rx8 organisation. Installing a different number of modules or a different pin layout would prevent proper operation in this system.

How it compares

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

Price $90.99
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 $2.84 per GB
Cheaper than about 90% 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 nameComputer Memory Solutions
Model nameCM10246410600SODRH
Total capacity32 GB (4 × 8 GB)
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL9
Memory timings9-9-9
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsApple Imac "Core I7 in 3.4 27 in (Mid-2011)
In the box
Included items4 Memory RAM Sticks

Questions about this item

What speed does the DDR3 1333 MHz SO-DIMM run at in this iMac?

The kit is rated PC3-10600 at 1333 MHz CL9; the Mid-2011 27-inch iMac memory controller locks DDR3 to 1333 MHz, so the modules operate at their rated speed.

Will these 204-pin SO-DIMMs fit the four slots in the Mid-2011 27-inch iMac?

Yes — the system has four SO-DIMM sockets and the kit supplies four 204-pin unbuffered non-ECC modules that match the Apple iMac12,2 / A1312 slot layout.

How do I install the four sticks and what step is commonly missed?

Power off and unplug the iMac, lay it face-down on a soft cloth, remove the bottom memory-access door, eject any existing modules, insert all four 8 GB sticks until they click, replace the door, then reconnect power — the step often missed is fully seating both ends so the retention clips snap shut.

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