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Four green DDR3 SO-DIMM modules with gold contacts

OWC

OWC 32GB (4×8GB) DDR3 1066 PC3-8500 CL7 204-pin SO-DIMM kit for 2009 iMac 27-inch

SKU CH-KNYG-YWNXB

32 GB DDR3 SO-DIMM kit with four 8 GB modules at 1066 MHz CL7 for 2009 iMac 27-inch

  • Total capacity32 GB (4 × 8 GB)
  • Rated speedDDR3 1066 (PC3 8500)
  • CAS latencyCL7
  • Buffer typeUnbuffered

Capacity 32GB (4 x 8GB)

  • 32 GB capacity from four matched 8 GB modules
  • DDR3 1066 MHz CL7 rated for responsive system performance
  • 204-pin SO-DIMM form factor fits the 2009 iMac 27-inch
  • JEDEC and RoHS compliant for reliable, standards-based operation
  • Unbuffered non-ECC design at 1.5 V for broad laptop and mini-PC compatibility

iMac 27-inch 2009 memory kit

This kit supplies 32 GB of DDR3 memory in four 8 GB SO-DIMMs built for the late 2009 iMac 27-inch (model ID iMac11,1). It targets owners who want the maximum supported capacity in a single upgrade. Buyers with other Mac models or newer iMacs cannot use these modules.

DDR3 1066 CL7 specification

The modules run at 1066 MHz with PC3-8500 rating and CL7 latency at 1.5 V. They are unbuffered, non-ECC, 204-pin SO-DIMMs that meet JEDEC standards. Systems requiring a different speed, voltage or pin count will not accept this kit.

32 GB capacity for heavy workloads

Four slots filled with 8 GB each deliver the full 32 GB ceiling for this iMac, giving ample headroom for large media libraries, virtual machines and creative suites. The limit is reached when all four sockets are occupied, so no further expansion is possible on this platform.

How it compares

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

Price $120.99
Cheaper than about 65% of the 21,161 comparable items (median $397.99).
Total capacity 32 GB (4 × 8 GB)
Typical for this category: the median of 20,941 items is 32 GB.
Price per GB $3.78 per GB
Cheaper than about 85% 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
Total capacity32 GB (4 × 8 GB)
Performance
Rated speedDDR3 1066 (PC3 8500)
Memory
CAS latencyCL7
ECC supportNo
Buffer typeUnbuffered

Other versions of this model

2 more in the same range

Questions about this item

What real-world speed will the 1066 MHz rating deliver once the modules are installed in the iMac?

The memory runs at 1066 MHz DDR3, matching the bus speed supported by the Late 2009 27-inch iMac.

Does the PC3-8500 label limit the bandwidth or latency in this kit?

PC3-8500 is the JEDEC designation for DDR3-1066; the kit operates at CL7 latency within that standard.

Will the 204-pin SO-DIMMs fit the 2009 iMac 27-inch memory slots?

Yes, the kit uses 204-pin SO-DIMMs, the correct form factor for the Late 2009 27-inch iMac.

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