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Four green DDR3 SO-DIMM sticks, 204-pin, no heat spreaders

Computer Memory Solutions

Computer Memory Solutions 16GB (4×4GB) DDR3 1066MHz CL7 SO-DIMM for iMac 21.5" Late 2009

SKU CH-K7BF-D199P

A 16GB kit of four 4GB DDR3 1066MHz CL7 SO-DIMM modules for the 21.5-inch iMac Late 2009

  • Capacity16GB (4 x 4GB)
  • Type204-Pin DDR3 SO-DIMM
  • SpeedDDR3 1066 (PC3 8500)
  • CAS LatencyCL7
  • Timing7-7-7
  • Voltage1.5V
  • 16 GB kit upgrades iMac to maximum supported memory
  • 4 × 4 GB modules fill all four SO-DIMM slots
  • DDR3 1066 MHz CL7 matches original specification
  • 204-pin unbuffered non-ECC design installs without changes
  • Guaranteed compatible with Late 2009 21.5" iMac

16GB DDR3 kit for Late 2009 iMac

This 16GB kit contains four 4GB DDR3 1066MHz CL7 SO-DIMM modules built for the 21.5-inch iMac (Late 2009). It matches the factory memory specification exactly and uses unbuffered, non-ECC chips at 1.5V. The 204-pin form factor fits the four SO-DIMM slots in that model.

Replaces the stock 4GB configuration

The iMac shipped with 4GB as two 2GB modules, leaving two slots empty. This kit fills all four slots to reach the 16GB maximum the system supports. The upgrade is worthwhile when macOS or applications show memory pressure with the original amount installed.

Suits owners of the 21.5-inch Late 2009 iMac

Buyers with a different iMac year, screen size or Mac model cannot use these modules. The DDR3 1066MHz specification and 204-pin SO-DIMM format are specific to the identified system. Anyone needing ECC, registered memory or a different speed should look elsewhere.

Points forts

  • 16 GB kit upgrades iMac to maximum supported memory
  • 4 × 4 GB modules fill all four SO-DIMM slots
  • DDR3 1066 MHz CL7 matches original specification
  • 204-pin unbuffered non-ECC design installs without changes
  • Guaranteed compatible with Late 2009 21.5" iMac

Caractéristiques

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" 3.33 21.5-Inch (Late 2009)
Package Content4 Memory RAM Sticks

Questions sur cet article

Will these 204-pin SO-DIMM sticks fit the four slots in my Late 2009 21.5-inch iMac?

Yes, the 204-pin DDR3 SO-DIMM form factor matches the four memory slots in the iMac "Core 2 Duo" 3.33 21.5-Inch (Late 2009) models MC413LL/A, iMac10,1 and A1311.

What is the correct way to seat each 4 GB module so the iMac recognises all 16 GB?

Power off, unplug, lay the iMac face-down on a soft cloth, remove the memory access door, press each module firmly into a slot until the side clips click, then replace the door before turning the Mac back on.

Do these unbuffered non-ECC sticks need any firmware updates or periodic replacement?

No firmware update is required; the CL7 1.5 V modules run at the native 1066 MHz speed. They have no heat spreaders or moving parts, so no scheduled replacement is needed under normal use.

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