We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Two green DDR3 SO-DIMM sticks, no heat spreaders

Computer Memory Solutions

Computer Memory Solutions 8GB (2x4GB) DDR3 1333MHz CL7 SO-DIMM iMac 21.5" Mid-2011

SKU CH-VS2H-WBX72

An 8 GB kit of two 4 GB DDR3 1333 MHz SO-DIMM modules built for the 21.5-inch iMac from Mid-2011

  • Total capacity8 GB (2 × 4 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL7
  • Memory timings7-7-7
  • Rated voltage1.5 V
  • 8 GB dual-channel kit lifts multitasking headroom
  • CL7 7-7-7 timing cuts latency for snappier response
  • 1333 MHz DDR3 matches the iMac mid-2011 memory bus
  • 204-pin SO-DIMM form factor slots straight in
  • Tested compatible with iMac 21.5-inch mid-2011 (MC309LL/A, iMac12,1, A1311)

8GB DDR3 SO-DIMM kit for 21.5-inch iMac (Mid-2011)

This 8GB kit contains two 4GB DDR3 1333MHz SO-DIMM modules built to 204-pin form factor. They run at 1.5V with CL7 7-7-7 timings and are unbuffered non-ECC. The kit is specified for the Apple iMac "Core i5" 2.5 21.5-inch (Mid-2011) models including MC309LL/A and iMac12,1.

Suits owners of the listed 2011 iMac seeking

Builders working on any other desktop, laptop or later iMac cannot use these modules. The 204-pin DDR3 interface and specific timing prevent installation in systems requiring different pin counts, voltages or memory generations. Buyers needing more than 8GB total capacity should look elsewhere.

1333MHz CL7 DDR3 speed grade decides fit

The modules operate at PC3-10600 1333MHz with CAS latency 7. If the target iMac requires this exact speed and latency combination the kit will function as intended. A different speed grade or latency will not match the system requirement.

How it compares

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

Price $41.99
Cheaper than about 80% 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 $5.25 per GB
Cheaper than about 73% 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 nameCM5126410600SODRH
Total capacity8 GB (2 × 4 GB)
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
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 I5 in 2.5 21.5 in (Mid-2011)
In the box
Included items2 Memory RAM Sticks

Questions about this item

How do I confirm the memory is running at 1333 MHz with CL7 timing after installation?

Open System Information on the iMac and check the Memory section; each module should show 1333 MHz speed and 7-7-7 timing.

What is included in the package and do I need any tools or extra parts?

The kit contains two 4 GB DDR3 SO-DIMM sticks; no tools or additional components are required for the iMac's user-accessible memory slots.

Which capacity kit should I choose for the Mid-2011 21.5-inch iMac with four slots?

This 8 GB (2×4 GB) kit fills two of the four slots; add a second identical kit later if you want the maximum 32 GB.

More in Model-Specific Memory Upgrades

Similar items