A-Tech 8GB Kit (2x4GB) DDR4 2400 SODIMM 260-Pin Memory Upgrade

8 GB DDR4 2400 kit for Apple iMac

This two-module kit delivers 8 GB of DDR4 2400 memory in SO-DIMM form factor for compatible Apple iMac models from 2017 and 2019. It targets owners of the 21.5-inch Retina 4K and 27-inch Retina 5K iMacs who want a straightforward capacity increase without opening the system beyond the user-accessible memory door.

Low-voltage unbuffered modules run cool and quiet

Each 4 GB module operates at 1.20 V without ECC or registered buffering, so power draw stays modest and no active cooling is required. The 1Rx16 organisation and major-brand chips keep thermals predictable during typical desktop workloads such as web browsing, office suites and light creative tasks.

Replaces factory 8 GB

The upgrade makes sense when the original 8 GB soldered or slotted memory limits multitasking or when a 16 GB factory build still feels tight under heavier workloads. It is not for users who need 32 GB or more, who require ECC error correction, or who own iMac models outside the listed 2017 and 2019 model identifiers.