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Breaking the 64GB Barrier: OWC Enables Up to 128GB Memory in 2019 iMac 5K, get 128GB for about the Price of 64GB!

A remarkably low price for 128GB memory for the 2019 iMac 4K makes the 2019 iMac 5K substantially more appealing for users for which 64GB isn’t quite enough.

Apple wants $1000 to upgrade from 8GB to 64GB. OWC is offering 128GB for $1099 or 96GB for $795. It’s a no-brainer: order the 2019 iMac 5K with 8GB, then get 96GB or 128GB memory from OWC. Installation is super easy by opening the panel on the back of the machine.

The single Thunderbolt 3 bus of the 2019 iMac 5K remains a drawback versus the iMac Pro, since arguably those needing 128GB are most likely as a group to need maximum Thunderbolt bandwidth. On the other hand, the 2019 iMac 5K is likely to be a bit faster for tasks that use four CPU cores or less.

There are two different 64GB memory kits from OWC for the 2019 iMac 5K: a 2-module kit and a 4-module kit (less expensive). The 2-module kit costs more because it uses higher-density memory chips, which are more expensive. If going with 64GB, MPG recommends the higher-priced 2-module 64GB kit (2 X 32GB) if there is any potential for later needing 96GB or 128GB.

For myself, I’d go with the 96GB memory kit because I don’t anticipate needing more than that (and it saves over $300). Because of system overhead, 96GB is more like 104GB in terms of memory usable by applications versus 64GB—60% more, not just 50% more.

Since the 2019 iMac 5K uses dual channel memory, four modules versus two has no bearing on memory bandwidth, unlike the iMac Pro.

OWC Enables Up to 4X RAM in 2019 iMac 5K vs Highest Factory Options

OWC has confirmed support for 128GB memory upgrades for the new 2019 27-inch iMac 5K; doubling the maximum factory offered memory, 64GB, in the 3.1GHz, 3.6GHz and 3.7GHz models and quadrupling it in the 3.0GHz, 32GB base model. OWC high-performing memory kits enable customers to boost performance levels and run more apps, work with larger files, speed up render times, and manipulate larger data sets.

Apple offers 32GB and 64GB memory options in the 2019 27-inch iMac 5K. OWC has certified and supports up to 128GB memory for all 2019 27-inch iMac 5K models, giving users up to four times the factory-available memory. This upgrade is exclusive to OWC and allows users to take new iMacs to their maximum potential, to create with endless possibilities.

For less than the price Apple charges to upgrade from 8GB to just 32GB, iMac owners can utilize OWC MaxRAM® with a 64GB Kit (32GB x 2) and jump up to 72GB. OWC’s 64GB Kit also enables users to utilize up to two of the existing factory memory modules to upgrade to 72GB, 80GB, or 96GB depending on what memory is already in the iMac or they can trade in their existing memory for even greater savings on their OWC iMac memory upgrade.

Availability and Pricing

OWC Memory Kits for the 2019 27-inch iMac 5K are available for same day shipping via OWC Memory Upgrades.

OWC MaxRAM DDR4 Kits for the 2019 27-inch Mac 5K models:

  • 64GB Kit (32GB x 2) OWC2666DDR4S64P – $579.99 MaxRAM
  • 96GB Kit (32GB x 2 + 16GB x 2) OWC2666DDR4S96S – $749.99 MaxRAM
  • 128GB Kit (32GB x 4) OWC2666DR4S128S – $1,099.99

When 64GB is enough, OWC offers kits providing a substantial per-gigabyte savings in comparison with factory-installed options.

OWC DDR4 RAM Upgrade Kits for the 2019 27-inch Mac 5K models:

  • 16GB Kit (8 GB x 2) OWC2666DDR4S16P – $118.88 (save 40% vs factory / 48% with trade-in)
  • 32GB Kit (16GB x 2) OWC2666DDR4S32P – $229.88 (save 62% vs factory / 63% with trade-in)
  • 64GB Kit (16GB x 4) OWC2666DDR4S64S – $449.99 (save 55% vs factory / 56% with trade-in)
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