All OWC brand memory is thoroughly tested and assured to perform flawlessly with your iMac and is covered by a Lifetime Advance Replacement Warranty and a Money-Back Guarantee. To make the memory installation process as stress-free and straightforward as possible, we provide step-by-step installation videos to walk users through the upgrade process and expert technical support, who are more than happy to answer any questions you may have. Any suggestions Im thinking about getting a single 1 GB to up the RAM to 1.5 GB total. Since Ive been a Windoze guy for so long, Im not sure where the best sources for Mac RAM might be. Since the debut of the Apple iMac in 1998, OWC has offered Apple-compatible memory upgrades for any Apple iMac desktop. Im about ready to jump into the Unity band wagon and the first step is to go out and buy my iMac 17' (Intel Duo).

Shop ram imac on AliExpress: Guess what, you can even find discount vouchers. We recommend professional installation for these models to ensure you upgrade your iMac RAM safely. Given our affordable prices for wireless mouse, youll surely be spoilt for choice. If you own a 21.5-inch iMac or an iMac Pro, the memory upgrade process is more advanced and involves removing and reinstalling the iMac screen to access the memory. In August 2020, Apple introduced an updated 27-inch iMac lineup with 10th-generation Intel processors, more RAM, more SSD storage, faster AMD GPUs, and True Tone support for the display. After opening this door, you can easily access and pull out the original memory and replace it with any other Apple-compatible memory modules. In the back of each 27-inch iMac, there is a small memory bay door that houses the memory cage.

it's all fine and good that Ctein is buying a top-of-theline machine for his needs. The good configuration to exploit the Dual Channel to get the best performance is “by DIMM” meaning to have same RAM sizes in same DIMM number.If you own a 27-inch iMac, upgrading the memory is simple and should only take about five minutes to complete. My current system is a 27-inch i7 Retina iMac that has 32 GB of RAM. Geekbench 4 shows and memory bandwitdh at 15.4 GB/sec for Single-Core and 16.6 GB/sec for Multi-Core With the following configuration System Information / Memory (by DIMM): ***.Geekbench 4 shows and memory bandwitdh at 8.76 GB/sec for Single-Core and 8.61 GB/sec for Multi-Core With the following configuration from System Information / Memory (by BANK): ***.Tested on iMac (27-inch Mid 2011) Intel Core i7 - 3.4 Ghz with High Sierra:

After reading contradictory answers, I decided to make some tests to determine what the correct way to add (2 x 8 GB) RAM to existing (2 x 4 GB) RAM.

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