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Two green SO-DIMM sticks with black chips and gold contacts

Computer Memory Solutions

Computer Memory Solutions CM512648500SODRH 8GB (2x4GB) DDR3 1066MHz SO-DIMM memory upgrade

SKU CH-YA3E-HT85Q

Dual-channel 8 GB kit of DDR3 1066 MHz SO-DIMMs for compatible Apple iMac Core i3/i5/i7 systems

  • Total capacity8 GB (2 × 4 GB)
  • Rated speedDDR3 1066 (PC3 8500)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL7
  • Memory timings7-7-7
  • Rated voltage1.5 V
  • 8GB kit (2×4 GB) doubles iMac memory
  • DDR3 1066 MHz PC3-8500 matches factory spec
  • CL7 7-7-7 timing keeps latency low
  • 5 V unbuffered non-ECC fits stock slots
  • 204-pin SO-DIMM installs in both iMac sockets

System-specific DDR3 SO-DIMM kit

This 8 GB kit contains two 4 GB DDR3 SO-DIMM modules rated at 1066 MHz (PC3-8500). It is built for Apple iMac models that shipped with Core i3, i5 or i7 processors and DDR3 memory controllers. The unbuffered, non-ECC design matches the original specification for those systems.

DDR3 1066 MHz interface limits

The modules run at 1.5 V with CL7 7-7-7 timings and a 2Rx8 organisation. The iMac platform supports a maximum of 16 GB across its two sockets, so this kit fills half the total capacity. Faster DDR3 1333 MHz memory will down-clock to 1066 MHz on this platform.

Straightforward two-module install

Installation requires opening the iMac memory door and seating both 204-pin sticks firmly until the latches click. The main risk is inserting only one module or not pressing hard enough, which leaves the system running in single-channel mode or failing to boot. Picture shown is for reference only; actual module appearance may vary.

How it compares

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

Price $40.99
Cheaper than about 80% 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 $5.12 per GB
Cheaper than about 75% of the 20,941 comparable items (median $8.19 per GB).

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Specifications

Product
Brand nameComputer Memory Solutions
Model nameCM512648500SODRH
Total capacity8 GB (2 × 4 GB)
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1066 (PC3 8500)
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 I3 I5 I7
In the box
Included items2 Memory RAM Sticks

Questions about this item

Should I choose the 8GB kit or look for a larger capacity?

The kit provides 8GB total as two 4GB modules; the iMac accepts a maximum of 16GB across its two slots so you can add another identical kit later if needed.

What does the 1066MHz rating mean once installed in my iMac?

The modules run at DDR3-1066 with CL7 timing at 1.5V; the iMac's memory controller will operate them at this speed even though the system also supports 1333MHz memory.

Does the 204-pin SO-DIMM interface limit performance in this iMac?

The 204-pin SO-DIMM form factor matches the iMac's slots exactly; the PC3-8500 rating sets the module's maximum transfer rate.

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