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Four green DDR3 SODIMM sticks with black chips

Computer Memory Solutions

Computer Memory Solutions 16GB (4x4GB) DDR3 1066MHz CL7 SODIMM iMac Late 2009 memory upgrade

SKU CH-A089-M1KDB

A 16 GB DDR3 kit (four 4 GB SO-DIMMs at 1066 MHz CL7) built for the Late 2009 21.5-inch iMac MC413LL/A

  • Capacity16GB (4 x 4GB)
  • Type204-Pin DDR3 SO-DIMM
  • SpeedDDR3 1066 (PC3 8500)
  • CAS LatencyCL7
  • Timing7-7-7
  • Voltage1.5V
  • 16 GB kit expands iMac memory to the maximum 16 GB
  • Four matched 4 GB modules install in all four slots
  • DDR3 1066 MHz CL7 timing matches factory specification
  • 204-pin SODIMM form factor fits Late 2009 iMac exactly
  • 5 V unbuffered non-ECC design ensures stable operation

System-Specific DDR3 Upgrade

This 16 GB kit contains four 4 GB DDR3 SO-DIMM modules built for the Apple iMac Core 2 Duo 3.06 21.5-inch Late 2009 (model MC413LL/A, iMac10,1). It uses 204-pin unbuffered non-ECC memory running at 1066 MHz with CL7 latency. The kit fills all four slots to reach the system's maximum supported capacity of 16 GB.

DDR3 1066 Interface Limits

The iMac's memory controller operates at 1066 MHz (PC3-8500), so faster DDR3 modules will downclock to this speed. Each slot accepts a single 204-pin SO-DIMM at 1.5 V. The four-slot design means total bandwidth is shared across all populated channels, and the platform cannot address more than 16 GB regardless of module density.

Capacity and Headroom

Four 4 GB sticks provide the full 16 GB ceiling for this model, eliminating the need to mix old and new modules. The kit suits users who run multiple applications or virtual machines on this vintage macOS platform. It does not help buyers who need more than 16 GB, ECC error correction, or support for later DDR generations.

Puntos fuertes

  • 16 GB kit expands iMac memory to the maximum 16 GB
  • Four matched 4 GB modules install in all four slots
  • DDR3 1066 MHz CL7 timing matches factory specification
  • 204-pin SODIMM form factor fits Late 2009 iMac exactly
  • 5 V unbuffered non-ECC design ensures stable operation

Especificaciones

BrandComputer Memory Solutions
ModelCM512648500SODRH
Capacity16GB (4 x 4GB)
Type204-Pin DDR3 SO-DIMM
SpeedDDR3 1066 (PC3 8500)
CAS LatencyCL7
Timing7-7-7
Voltage1.5V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemApple Imac Core 2 Duo 3.06 21.5" Late 2009 Mc413Ll/A
Package Content4 Memory RAM Sticks

Preguntas sobre este artículo

Should I pick the 16GB kit with four 4GB sticks or a different capacity for my Late 2009 iMac?

The Late 2009 iMac supports a maximum of 16GB across its four slots, so this 4x4GB kit fills every socket and reaches the system limit.

What does the 1066MHz rating deliver once the modules are installed in the iMac?

The memory runs at DDR3 1066MHz with CL7 timing, matching the iMac's native bus speed for stable operation at the rated frequency.

How does the 204-pin DDR3 SO-DIMM interface limit performance in this machine?

The 204-pin DDR3 SO-DIMM form factor caps the upgrade to DDR3 1066MHz bandwidth, which is the highest speed the Late 2009 iMac memory controller accepts.

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