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Two green SO-DIMM sticks with black chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions CM512648500SODRH 8GB (2x4GB) DDR3 1066MHz CL7 1.5V 204-pin SO-DIMM memory upgrade

SKU CH-SZ4S-DHZT2

A 1066 MHz DDR3 SO-DIMM kit adding 8 GB across two 4 GB modules for the Late 2009 21.5-inch iMac

  • Capacity8GB (2 x 4GB)
  • Type204-Pin DDR3 SO-DIMM
  • SpeedDDR3 1066 (PC3 8500)
  • CAS LatencyCL7
  • Timing7-7-7
  • Voltage1.5V
  • 8GB kit upgrades Late 2009 iMac to 16GB max
  • Two 4GB DDR3 1066MHz CL7 modules install in free slots
  • 5V unbuffered non-ECC SO-DIMM matches factory spec
  • 204-pin form factor fits Apple iMac Core 2 Duo 3.06 21.5
  • Major-brand chips backed by CMS lifetime warranty

Apple iMac Late 2009 upgrade

This 8 GB kit contains two 4 GB DDR3 SO-DIMM modules built for the 21.5-inch iMac Core 2 Duo 3.06 GHz model MB950LL/A. The sticks run at 1066 MHz with CL7 timing and 1.5 V unbuffered operation. They fill the two empty slots on a system that ships with 4 GB installed.

Sustained workload behaviour

At DDR3-8500 speed the modules deliver steady throughput for everyday multitasking, media playback and light creative work. The 7-7-7 latency helps keep response consistent when several applications share the 16 GB maximum capacity. No heat spreader is fitted, so airflow in the iMac chassis handles thermal load.

Build and connectors

Each stick uses a standard 204-pin SO-DIMM edge connector that slots directly into the iMac memory bays. Major-brand DRAM chips are used throughout and the kit carries a limited lifetime warranty from Computer Memory Solutions. Buyers needing ECC error correction or registered buffering should look elsewhere, as this kit is non-ECC and unbuffered.

Highlights

  • 8GB kit upgrades Late 2009 iMac to 16GB max
  • Two 4GB DDR3 1066MHz CL7 modules install in free slots
  • 5V unbuffered non-ECC SO-DIMM matches factory spec
  • 204-pin form factor fits Apple iMac Core 2 Duo 3.06 21.5
  • Major-brand chips backed by CMS lifetime warranty

Specifications

BrandComputer Memory Solutions
ModelCM512648500SODRH
Capacity8GB (2 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 MB950LL/A
Package Content2 Memory RAM Sticks

Questions about this item

Does the 1.5 V DDR3-1066 kit run hot or loud when the iMac is under load all day?

The modules are unbuffered, non-ECC SO-DIMMs without a heat spreader, so they add no fan noise and rely on the iMac's existing airflow; typical DDR3 power draw at 1.5 V stays low during continuous use.

What must the Late 2009 21.5-inch iMac (MB950LL/A) already have for this 2 × 4 GB kit to work?

The iMac ships with 4 GB in two 2 GB sticks and two empty 204-pin slots; simply insert both 4 GB modules into the free slots — no tools, firmware updates or extra hardware are required.

Will the CL7 1066 MHz sticks down-clock reliably alongside the original 1066 MHz memory Apple installed?

Yes, all four modules share the same DDR3-1066 speed and 1.5 V voltage, so the memory controller runs the full 8 GB at the stock 1066 MHz CL7 timing without manual adjustment.

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