Apple iMac Retina 5K, 27-inch, Late 2015 - 4.0GHz Core i7 Compatible Memory / RAM Upgrades

Not your exact model? See all Apple iMac or 2015 First Released models, or use our Apple Serial Number Search
Model Specifications 186,382 Apple Upgrades Shipped
Apple iMac Retina 5K, 27-inch, Late 2015 - 4.0GHz Core i7
Make & Model: Apple iMac Retina 5K, 27-inch, Late 2015 - 4.0GHz Core i7
Apple Reference: iMac17,1     2834     A1419
Total Memory Slots:

This is the total number of Memory / RAM slots in your computer.

The number of "available" slots will depend on what is already installed.

To locate and check the number of empty slots please follow the installation guides and videos from the Support menu above.

The example below shows 4 empty desktop memory slots.

Maximum Memory:

This is the maximum total amount of Memory you can install in your computer.

This amount is usually divided by the number of slots to give the maximum per slot.

Below are two examples, they may not apply to this particular model.

  • Example 1
    64GB Maximum with 4 Slots
    Upgrade using 4 x 16GB modules
  • Example 2
    16GB Maximum with 2 Slots
    Upgrade using 2 x 8GB modules
Installed Memory: Check how much Memory you currently have installed
Model Guide: Download User Guide for your Apple iMac
Important Notes:

Mr Memory recommends you install modules in pairs for Dual Channel performance - View Dual Channel Memory Video.

For Guaranteed Compatible Memory, please choose a model that matches your model's Release Date, Screen Size and Processor - How to Identify your Apple.

To get the best performance and speed from your iMac, upgrade to the maximum memory.

We always send matched modules, when you order 2 or more.

Help Me Choosei
Choose a Memory upgrade for your Apple iMac Retina 5K, 27-inch, Late 2015 - 4.0GHz Core i7:
Product Downloads
Kingston HyperX Impact DDR3 PC3-14900 1866MHz SODIMM (1867MHz)
Product Specifications

HyperX® Impact DDR3 1866MHz memory automatically recognises the platform it's plugged into and auto overclocks to the highest frequency published with no need to adjust system BIOS settings. So you get extreme performance that supports Notebooks, iMacs, All-in-Ones and small form factor systems, using either AMD or the latest Intel CPU technologies with no hassle at all - even if you’re a newbie. Impact makes your game hotter while keeping your system cool. It has low voltage settings at 1.35V for less power consumption, reduced heat generation and quiet computing. Its slim, sleek new look lets you stand out in the crowd while the thin thermal label allows for installation in slim or ultra-slim notebooks.

All memory comes with a Full Lifetime Warranty and is packaged and protected by bespoke Mr Memory Anti-Static shield bags or boxes.

SizeAll Memory Modules are supplied as single modules. To order multiple 'matched' modules, please adjust the quantity. Stock
Price  Inc VAT
QuantityAll Memory Modules are supplied as single modules. To order multiple 'matched' modules, please adjust the quantity.Price PromiseYou can be confident in receiving the highest quality products at the lowest prices.


In Stock


In Stock
Orders placed Monday to Friday after 5.15pm (UK time) or on weekends/bank holidays will be processed the next business day.
(subject to stock, order verification and chosen delivery option)
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