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Two green DDR3 SO-DIMM sticks with black chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions CM512648500SODRH 8GB (2x4GB) DDR3 1066MHz CL7 1.5V Mac Mini Late 2009 memory upgrade

SKU CH-TKQ8-10QVW

Two 4 GB DDR3 SO-DIMM modules at 1066 MHz CL7 1.5 V for the Apple Mac Mini Late 2009

  • Total capacity8 GB (2 × 4 GB)
  • Rated speedDDR3 1066 (PC3 8500)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL7
  • Memory timings7-7-7
  • Rated voltage1.5 V
  • 8GB dual-channel kit doubles stock capacity for Late 2009 Mac Mini
  • CL7 1066 MHz timing keeps latency low on PC3-8500 bus
  • 5 V unbuffered DDR3 SO-DIMM matches factory voltage spec
  • 204-pin form factor fits the two SO-DIMM slots without adapters
  • CMS lifetime warranty backs compatibility guarantee for Macmini3,1

Mac Mini Late 2009 memory kit

This 8 GB kit contains two 4 GB DDR3 SO-DIMM modules rated at 1066 MHz with CL7 timings. It is built specifically for the Apple Mac Mini "Core 2 Duo" 2.53 (Late 2009) models MC239LL/A and Macmini3,1. The modules run at 1.5 V and use major-brand chips on unbuffered, non-ECC PC3-8500 boards.

Installation notes

The Mac Mini Late 2009 uses 204-pin SO-DIMM slots accessible by removing the bottom cover; no tools beyond a putty knife or spudger are usually required. Apple officially supports only 4 GB, so the full 8 GB capacity requires EFI Firmware Update 1.2 to be applied before the extra memory is recognised. Without that update the system will not boot with both modules installed.

Who this suits

Ideal for owners of the Late 2009 Mac Mini who want to maximise RAM for multitasking or legacy macOS workloads and are comfortable applying the firmware update. Buyers with earlier or later Mac Mini models, or systems requiring ECC or registered memory, should look elsewhere.

How it compares

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

Price $36.99
Cheaper than about 82% of the 21,161 comparable items (median $397.99).
Total capacity 8 GB (2 × 4 GB)
Lower than about 80% of the 20,941 comparable items (median 32 GB).
Price per GB $4.62 per GB
Cheaper than about 81% 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
Brand nameComputer Memory Solutions
Model nameCM512648500SODRH
Total capacity8 GB (2 × 4 GB)
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1066 (PC3 8500)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL7
Memory timings7-7-7
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsApple Mac Mini "Core 2 Duo" 2.53 (Late 2009)
In the box
Included items2 Memory RAM Sticks

Questions about this item

How can I confirm the 1066 MHz CL7 timing is active after installing both 4 GB sticks in my Late 2009 Mac Mini?

Open About This Mac, click System Report, select Memory, and verify each slot shows a 4 GB DDR3 module running at 1066 MHz with CL7 timing.

The box lists two 4 GB DDR3 1066 MHz SO-DIMM sticks — is anything else required to reach 8 GB on a Mac Mini 3,1?

No extra parts are needed; the kit includes both 204-pin modules. Apply EFI Firmware Update 1.2 so the system recognises the full 8 GB.

Should I choose the 8 GB kit (2 × 4 GB) or keep the original 1 GB or 2 GB configuration for my MC239LL/A?

The 8 GB kit (2 × 4 GB) is the only option listed; it replaces the factory 1 GB or 2 GB modules and, after firmware 1.2, gives the maximum supported capacity.

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