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

Computer Memory Solutions

Computer Memory Solutions CM2566410600SODRH 4GB (2x2GB) DDR3 1333MHz SODIMM memory upgrade

SKU CH-3QW3-2JAS3

4 GB kit of two 2 GB DDR3 1333 MHz SODIMM modules for 27-inch iMac Mid 2011

  • Total capacity4 GB (2 × 2 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL7
  • Memory timings7-7-7
  • Rated voltage1.5 V
  • 4GB kit boosts iMac responsiveness with two 2GB DDR3 1333MHz modules
  • CL7 timing and 1.5V operation deliver stable performance for Mid 2011 27-inch iMac
  • 204-pin SODIMM form factor fits the four-slot architecture supporting up to 32GB total
  • Unbuffered non-ECC design matches factory specifications for 3.4GHz quad-core Intel Core i7
  • Major-brand chipset and CMS lifetime warranty ensure reliable long-term operation

System-specific DDR3 SODIMM kit

This 4 GB kit contains two 2 GB DDR3 1333 MHz SO-DIMM modules built to PC3-10600 specification. They are validated for the Apple iMac 27-inch Mid 2011 with a 3.4 GHz quad-core Intel Core i7 processor and use the standard 204-pin DDR3 form factor.

Suitable for owners of that exact iMac model

The modules are unbuffered, non-ECC and run at 1.5 V with CL7 timing. Buyers with a different iMac year, screen size or processor should look elsewhere because the kit is qualified only for the Mid 2011 27-inch 3.4 GHz quad-core i7 configuration.

Two-slot kit for a four-slot machine

The iMac ships with 4 GB installed across two slots and offers four slots in total with a 32 GB maximum. This pair fills the two free slots, raising the total to 8 GB without removing the original memory.

How it compares

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

Price $12.99
Cheaper than about 95% of the 21,161 comparable items (median $397.99).
Total capacity 4 GB (2 × 2 GB)
Lower than about 90% of the 20,941 comparable items (median 32 GB).
Price per GB $3.25 per GB
Cheaper than about 88% 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 nameCM2566410600SODRH
Total capacity4 GB (2 × 2 GB)
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL7
Memory timings7-7-7
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsApple Imac 3.4 GHz Quad-Core Intel-Core I7 27 in Mid 2011
In the box
Included items2 Memory RAM Sticks

Questions about this item

Should I buy the 4GB kit or add a single 2GB module instead?

This kit supplies two matched 2GB modules totalling 4GB and is the simplest way to reach the 32GB maximum across four slots on the compatible iMac.

Will the 1333MHz rating run at that speed once installed?

The modules are rated PC3-10600 at 1333MHz with CL7 timing and will operate at that frequency in the supported iMac.

Does the 204-pin DDR3 SO-DIMM interface limit the bandwidth I can use?

The 204-pin DDR3 SO-DIMM form factor carries the PC3-10600 signal, capping throughput at the 1333MHz data rate specified for this kit.

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