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Two green DDR3 SO-DIMM sticks, 204-pin, no heat spreader

Computer Memory Solutions

Computer Memory Solutions 8GB (2x4GB) DDR3 1333 Apple iMac Core i5 2.5 21.5 Mid-2011 memory upgrade

SKU CH-WYYF-M7FFD

8GB dual-channel kit of 204-pin DDR3 1333 SO-DIMMs for mid-2011 21.5-inch Core i5 iMac

  • Capacity8GB (2 x 4GB)
  • Type204-Pin DDR3 SO-DIMM
  • SpeedDDR3 1333 (PC3 10600)
  • CAS LatencyCL7
  • Timing7-7-7
  • Voltage1.5V
  • 8GB kit expands the iMac to its 32GB maximum
  • 1333 MHz DDR3 matches the original memory speed
  • CL7 timing keeps latency low for responsive multitasking
  • 204-pin SO-DIMM form factor fits the Mid-2011 iMac slots exactly
  • Guaranteed compatibility with iMac 12,1 (MC309LL/A, A1311)

Targeted Upgrade

This 8GB kit supplies two 4GB DDR3 SO-DIMMs built for the 21.5-inch iMac with a 2.5 GHz Core i5 from Mid-2011. The modules match the factory PC3-10600 specification and 204-pin form factor. Owners of that exact model can install both sticks to reach the system's supported capacity.

Steady Operation

Rated at 1333 MHz with CL7 timings, the memory maintains its rated speed during extended workloads without downclocking. Unbuffered, non-ECC chips and 1.5V operation keep latency consistent across long rendering or virtualisation sessions. The 2Rx8 organisation supports the platform's dual-channel architecture throughout sustained use.

Thermal Profile

Without a heat spreader, the modules rely on the iMac's internal airflow to stay within safe limits. Standard DDR3 power draw at 1.5V produces modest heat that the stock cooling handles quietly. No additional fan noise or temperature spikes appear during typical desktop and creative workloads.

商品特色

  • 8GB kit expands the iMac to its 32GB maximum
  • 1333 MHz DDR3 matches the original memory speed
  • CL7 timing keeps latency low for responsive multitasking
  • 204-pin SO-DIMM form factor fits the Mid-2011 iMac slots exactly
  • Guaranteed compatibility with iMac 12,1 (MC309LL/A, A1311)

商品規格

BrandComputer Memory Solutions
ModelCM5126410600SODRH
Capacity8GB (2 x 4GB)
Type204-Pin DDR3 SO-DIMM
SpeedDDR3 1333 (PC3 10600)
CAS LatencyCL7
Timing7-7-7
Voltage1.5V
ECCNo
Buffered/RegisteredUnbuffered
Rank2Rx8
ChipsetMajor Brand Chipset
Heat SpreaderNo
Compatible SystemApple Imac "Core I5" 2.5 21.5-Inch (Mid-2011)
Package Content2 Memory RAM Sticks

商品問答

Does the 1.5 V DDR3-1333 kit run noticeably hotter or louder than the original modules during long sessions?

The modules have no heat spreader and draw standard 1.5 V DDR3 power, so they add minimal heat and produce no noise of their own.

My Mid-2011 iMac currently has two 2 GB sticks — do I need to remove them before installing this 2×4 GB kit?

Yes, the iMac has four SO-DIMM slots and supports up to 32 GB; you can keep the existing sticks if free slots remain, but replacing them gives a cleaner 8 GB total.

Will these CL7 204-pin SO-DIMMs work reliably alongside the original 1333 MHz memory already in my iMac?

They match the factory DDR3-1333 speed and 204-pin form factor, so the system will run all populated slots at the common 1333 MHz rate without timing conflicts.

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