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Two green DDR3 SO-DIMM sticks with black chips

Computer Memory Solutions

Computer Memory Solutions 8GB DDR3 1333 SO-DIMM 2×4GB iMac 27 2011

SKU CH-VEVW-CRFYH

8GB DDR3 1333 SO-DIMM kit of two 4GB modules for the 27-inch 2011 iMac

  • Total capacity8 GB (2 × 4 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL7
  • Memory timings7-7-7
  • Rated voltage1.5 V
  • 8GB kit upgrades your iMac to 8GB total capacity
  • Two 4GB modules fill two slots for dual-channel performance
  • DDR3 1333 speed matches the original specification exactly
  • CL7 timing and 1.5V voltage meet Apple factory requirements
  • Compatible with the 27-inch Mid-2011 iMac Core i5 3.1 model

8 GB DDR3 SO-DIMM kit for 27-inch 2011 iMac

This two-module kit provides 8 GB of DDR3 1333 memory in a 204-pin SO-DIMM format. It is built specifically for the Apple iMac "Core i5" 3.1 27-Inch (Mid-2011) MC814BZ/A. The unbuffered, non-ECC modules run at 1.5 V with CL7 timing. Buyers upgrading that exact model receive a matched pair for dual-channel operation.

Check your iMac model and slot count

The kit fits only the Mid-2011 27-inch iMac identified as MC814BZ/A with a 3.1 GHz Core i5 processor. That system accepts a maximum of 32 GB across four SO-DIMM slots. Verify the model identifier in About This Mac before ordering. If your iMac is a different year, size or processor configuration, this memory will not be compatible.

Matched pair enables dual-channel performance

Two 4 GB sticks are included so the memory controller can run in dual-channel mode, which improves bandwidth over a single module. The CL7 7-7-7 timing is factory-set; no BIOS adjustment is possible on this platform. The kit contains only the two SO-DIMM modules — no tools, cables or software are bundled.

How it compares

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

Price $38.99
Cheaper than about 81% 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).
Price per GB $4.87 per GB
Cheaper than about 78% 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 nameCM5126410600SODRH
Total capacity8 GB (2 × 4 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 "Core I5 in 3.1 27 in (Mid-2011) MC814BZ/A
In the box
Included items2 Memory RAM Sticks

Questions about this item

Does the kit contain anything other than the two 4 GB SO-DIMM sticks?

The package contains only the two 4 GB 204-pin DDR3 SO-DIMM modules; no tools, brackets or documentation are included.

Why is this listed as a 2×4 GB kit rather than a single 8 GB module?

The iMac has four SO-DIMM slots and supports up to 32 GB; a matched pair fills two slots in dual-channel mode and leaves the other two slots free for future expansion.

Will the CL7 1333 MHz rating actually run at that speed inside the Mid-2011 27-inch iMac?

Yes — the iMac's memory controller is specified for 1333 MHz DDR3, so the modules operate at their rated 1333 MHz with 7-7-7 timings at 1.5 V.

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