iMac 12,1 (21.5-inch, Mid 2011) Intel Core i5 | i7

CPU/Chipset:

Intel Core i5 2.5 GHz Intel HM67

Intel Core i5 2.7 GHz Intel HM67

Intel Core i7 2.8 GHz Intel HM67

Expansion Slot:

4 Slots

Standard Memory:

4GB

Maximum Memory

16GB (Apple) | 32GB (Tested and Approved) (4x8GB)

Installation Guide:

Ram Installation

Why Upgrade Your Ram?

Benefits of Upgrading Your Ram

Note:

Any combination of 2GB, 4GB and 8GB modules can reach the configuration of up to 32GB. You can't install a single 16GB module.