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Two green DDR3 SODIMM modules with black chips, no heat spreaders

Computer Memory Solutions

Computer Memory Solutions CM512648500SODRH 8GB (2x4GB) DDR3 1066MHz CL7 SODIMM iMac 24" Early 2009

SKU CH-ZS30-NHZN1

8GB DDR3 1066MHz CL7 SODIMM kit upgrades the 24-inch iMac Early 2009 to its 8GB maximum

  • 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 kit upgrades the iMac 24" Early 2009 to its 8GB maximum
  • 1066 MHz DDR3 speed matches the factory memory specification exactly
  • CL7 CAS latency delivers responsive timing for everyday workloads
  • 204-pin SODIMM form factor fits the two available memory slots directly
  • 5 V operation keeps power draw within the original design limits

Targeted upgrade for the 24‑inch iMac (Early 2009)

This 8 GB kit (2 × 4 GB) of DDR3‑1066 CL7 SO‑DIMM memory is built specifically for the Apple iMac “Core 2 Duo 2.93 24” Early 2009 (model MB419LL/A, A1225). It matches the original 1.5 V unbuffered, non‑ECC specification so the system recognises the modules without configuration changes.

Fits the two factory SO‑DIMM slots

The iMac ships with 4 GB across two slots; this pair occupies the remaining sockets and brings total memory to the platform maximum of 8 GB. No heat spreader is included, keeping the low‑profile form factor required by the slim all‑in‑one chassis, and the 204‑pin DDR3 interface aligns with the board’s native memory controller.

Replaces the stock 2 GB modules when all four

Builders who have already filled the first two slots with 2 GB sticks can swap them for this 4 GB pair to reach the 8 GB limit in a single step. The upgrade is worthwhile when the machine runs memory‑intensive macOS versions or creative workloads that exceed the original 4 GB; it does not benefit systems that cannot address more than 4 GB total.

How it compares

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

Price $35.99
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 $4.50 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 Imac "Core 2 Duo 2.93 24 in Early 2009 MB419Ll/A
In the box
Included items2 Memory RAM Sticks

Questions about this item

Does the DDR3 1066MHz CL7 timing limit bandwidth under sustained workloads?

The kit runs at 1066 MHz with CL7 7-7-7 timing, so sustained throughput is capped by that DDR3 8500 specification.

How much heat or power draw should I expect from these unbuffered SODIMMs running all day?

Each 4 GB module operates at 1.5 V without a heat spreader, so thermal output and power draw are low for typical all-day use.

My iMac currently has two 2 GB sticks installed — do I need to remove them before adding this 2×4 GB kit?

Yes, the system has two slots total and maxes at 8 GB, so the existing modules must be replaced with this pair.

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