In fact, Apple notes that the machine supports a maximum of 64GB of RAM in a 4 x 16GB SO-DIMM module configuration, but it turns out that users wishing to upgrade can go beyond that number.Īs initially discovered by OWC, the 2019 27-inch 5K iMac can support up to 128GB of RAM via a 4 x 32GB SO-DIMM module configuration. Watch our video tutorial for a step-by-step 5K iMac memory upgrade guide.Īlthough the 2019 iMac can support up to 128GB of RAM, Apple restricts its build-to-order configurations to a maximum of 64GB of RAM. The good news is that even if you’re not interested in maxing out to 128GB of RAM, it’s incredibly easy to upgrade your 5K iMac’s memory, and you can save a whole lot of money in the process of doing so. For the first time, it’s now possible to upgrade the 27-inch 5K iMac with 128GB of RAM, although you’ll need to do so using third-party memory suppliers.

In addition to the CPU and GPU, there’s another key upgrade element that got some love this year: Memory, and lots of it. Along with new 6-core and 8-core Intel options for faster CPU performance, new Radeon Pro Vega GPUs provide faster graphics. Apple’s long-awaited refresh of the iMac lineup finally happened, and it brought about incremental, but nonetheless worthwhile, enhancements to the lineup.

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