Which RAM memory cards should i buy?

Question

Which RAM memory cards should i buy?

Hello all,

I have an iMac Retina 5K, 27-inch, late 2015 and only have 8gb 1867 MHz DDR3 memory (plus a 1TB hard drive built in). So need more RAM to get the speed back up again (it's going VERY slowly now with just chrome and iTunes open these days).

I want to start using big programs like garageband and then Logic etc so am thinking getting two 4gb slots to get it up to 16GB.

I'm wary of the spec requirements and it's a bit of a minefield, so can anyone recommend the right SO-DIMMS to buy?

On here the support suggests:

Use Small Outline Dual Inline Memory Modules (SO-DIMM) that meet all of these criteria:

PC3-14900
Unbuffered
Nonparity
204-pin
1867MHz DDR3 SDRAM

Finding the PC3-14900 seems to be the trickiest bit - any suggestions?

Thanks in advance!

Sam

iMac 27", macOS 10.15

Posted on May 12, 2020 9:14 AM

Reply

Answer 1

den.thed

Level 10

94,552 points

May 12, 2020 9:21 AM in response to funkymonk1985

Mac's are very picky and your best bet is to purchase modules from either OWC or Crucial.

https://eshop.macsales.com/shop/memory/iMac/Retina-5K2015/DDR3L

https://www.crucial.com/compatible-upgrade-for/apple/imac-%28retina-5k--27-inch--late-2015%29-imac17-1

Reply

Answer 2

May 12, 2020 9:43 AM in response to den.thed

Thanks for the quick reply! I was rather hasty and have just ordered the following, which claims to be suitable for my exact iMac - the spec matches up (I think!) to the spec on the Apple website.

Do you think these two i bought (2 x 8GB) are suitable? If not I can just cancel the order. Thanks!

Apple iMac Retina 5K, 27-inch, Late 2015 - 3.2GHz Core i5 Compatible Upgrade

8GB Kingston HyperX Impact DDR3 PC3-14900 1866MHz SODIMM

The link to the page is here (I'm UK based so tried to shop here):

https://www.mrmemory.co.uk/memory-ram-upgrades/apple/imac/retina-5k-27-inch-late-2015-3.3ghz-core-i5#!kingston-hyperx-impact-ddr3-pc3-14900-1866mhz-sodimm

Reply