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 SO-DIMM sticks with black chips, no heat spreader

Computer Memory Solutions

Computer Memory Solutions CM10246410600SODRH 16GB DDR3 1333MHz 2x8GB SO-DIMM

SKU CH-CKN1-1PHQ8

A 16 GB DDR3 SO-DIMM kit for the mid-2011 21.5-inch iMac with a 2.8 GHz Core i7

  • Total capacity16 GB (2 × 8 GB)
  • Rated speedDDR3 1333 (PC3 10600)
  • ChipsetMajor Brand Chipset
  • CAS latencyCL9
  • Memory timings9-9-9
  • Rated voltage1.5 V
  • 16 GB total capacity from two 8 GB modules
  • 1333 MHz DDR3 speed for responsive multitasking
  • CL9 latency timing for efficient data access
  • 5 V operation matching standard DDR3 voltage
  • Designed for 2011 21.5-inch iMac with Core i7 2.8 GHz

16GB DDR3 SO-DIMM kit for 21.5-inch 2011 iMac

This 16GB kit contains two 8GB DDR3 1333MHz SO-DIMM modules built for the Apple iMac "Core i7" 2.8 21.5-Inch (Mid-2011). The 204-pin unbuffered non-ECC sticks run at 1.5V with CL9 9-9-9 timing. It is a direct memory upgrade for that specific all-in-one desktop.

Sustained-load behaviour with major-brand chips

Major-brand chipsets on each module maintain stable DDR3 1333 operation during extended workloads. The 2Rx8 organisation and standard voltage keep timings consistent without thermal throttling. Unbuffered layout avoids extra latency that registered designs add under continuous memory pressure.

Two-slot limit decides fit for 32GB maximum

The iMac model accepts four SO-DIMM sockets with a 32GB ceiling, so this 16GB two-stick kit leaves two slots open for a later matched pair. Buyers who need the full 32GB immediately must source two additional 8GB modules of the same specification.

How it compares

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

Price $45.99
Cheaper than about 79% of the 21,161 comparable items (median $397.99).
Total capacity 16 GB (2 × 8 GB)
Lower than about 70% of the 20,941 comparable items (median 32 GB).
Price per GB $2.87 per GB
Cheaper than about 90% 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 nameCM10246410600SODRH
Total capacity16 GB (2 × 8 GB)
Product type204-Pin DDR3 SO-DIMM
Performance
Rated speedDDR3 1333 (PC3 10600)
Processor
ChipsetMajor Brand Chipset
Memory
CAS latencyCL9
Memory timings9-9-9
ECC supportNo
Buffer typeUnbuffered
Memory rank2Rx8
Heat spreaderNo
Power
Rated voltage1.5 V
Compatibility
Compatible systemsApple Imac "Core I7 in 2.8 21.5 in (Mid-2011)
In the box
Included items2 Memory RAM Sticks

Questions about this item

How much power do the two 8 GB sticks draw at the rated 1.5 V?

Each module runs at 1.5 V, so the pair draws the standard DDR3 SO-DIMM power for that voltage without extra cooling.

Does my Mid-2011 iMac need all four slots filled to use this 2 x 8 GB kit?

The kit occupies two of the four slots, leaving the other two free for future expansion up to the 32 GB maximum.

Will these CL9 1333 MHz modules slow down if I keep the original 1333 MHz sticks in the other slots?

All installed DDR3 1333 MHz memory runs at the same speed and timings, so mixing old and new modules does not reduce performance.

More in Model-Specific Memory Upgrades

Similar items