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Four green circuit boards with gold contacts and black chips, 204-pin SODIMM form factor

A-Tech

A-Tech 16GB Kit (4x4GB) DDR3 1066MHz PC3-8500 SODIMM 204-Pin Memory Upgrade for Apple iMac Late 2009

SKU CH-VYEB-K31VY

16 GB DDR3 1066 MHz SODIMM kit (4 × 4 GB) for 21.5-inch and 27-inch iMac Late 2009 models

  • Capacity16GB (4 x 4GB)
  • SpeedDDR3 1066 (PC3 8500)
  • Voltage1.50V
  • ECCNo
  • Buffered/RegisteredUnbuffered
  • Rank2Rx8
  • 16 GB kit for faster multitasking on iMac Late 2009
  • Four 4 GB modules fill every slot for maximum capacity
  • DDR3 1066 MHz matches original specification exactly
  • 204-pin SODIMM fits 21.5-inch and 27-inch models
  • Non-ECC unbuffered design ensures stable operation

16GB DDR3 Kit for Late 2009 iMac

This kit provides four 4GB SO-DIMM modules for a total of 16GB of DDR3 1066MHz memory. It is built for the 21.5-inch and 27-inch iMac models released in late 2009, matching the factory PC3-8500 specification. The unbuffered, non-ECC design fits the standard SO-DIMM slots used in these all-in-one desktops. Users restoring or upgrading these specific machines will find the correct form factor and voltage.

204-Pin SO-DIMM Build and Daily Use

Each module uses a 204-pin SO-DIMM edge connector without a heat spreader, keeping the profile low enough for the tight iMac memory bay. Major-brand chips are used throughout, and every stick is tested before shipping. The 1.50V operating voltage matches the original Apple requirement, so the system recognises the memory without manual configuration. Installation follows the standard hatch process on the back of the iMac chassis.

DDR3 1066MHz Practical Limits

The PC3-8500 interface caps bandwidth at the DDR3 1066MHz data rate, so heavier workloads will hit a throughput ceiling regardless of capacity. Four ranks of 2Rx8 organisation fill all available slots on these iMacs, leaving no room for further expansion. The kit does not support ECC or registered operation, so it cannot be used in workstations or servers that require those features. Buyers needing higher speeds or larger total memory must move to a newer platform.

商品特色

  • 16 GB kit for faster multitasking on iMac Late 2009
  • Four 4 GB modules fill every slot for maximum capacity
  • DDR3 1066 MHz matches original specification exactly
  • 204-pin SODIMM fits 21.5-inch and 27-inch models
  • Non-ECC unbuffered design ensures stable operation

商品規格

BrandA-Tech
SeriesA-Tech DDR3 Apple Mac RAM Memory Upgrades
Capacity16GB (4 x 4GB)
SpeedDDR3 1066 (PC3 8500)
Voltage1.50V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemApple Mac Systems
FeaturesMajor Brand Chips

商品問答

What DDR3 speed and PC3 rating does this kit run at?

The modules operate at 1066 MHz (also listed as 1067 MHz) with a PC3-8500 rating.

What physical slot type and pin count are required for installation?

The kit uses 204-pin SO-DIMM modules that fit the standard DDR3 SODIMM slots in the supported iMacs.

How do I install the four modules in a Late 2009 iMac, and what step is commonly missed?

Power off and unplug the iMac, remove the memory access door, release the retaining clips on each slot, insert all four 4 GB modules until the clips lock, then replace the door before powering on.

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