OWC Memory Upgrades For 27″ iMac with Retina 5K Display (Late 2015)devynzal2020-07-25T16:10:04+00:00 Actual product may differ slightly in appearance. Memory trade-in rebateSend us your old memory when you upgrade and we’ll give you a rebate! OWC Memory This Mac has four available memory slots.Install in pairs for best performance.Backed by an OWC Limited Lifetime Warranty. Value Performance Buying Options1600MHz DDR3 PC3-12800 — Maximum 64GB supported16GB (16GB x 1)15,990 Buy Now32GB (16GB x 2)29,990 Buy Now48GB (16GB x 2 + 8GB x 2)38,990 Buy Now64GB (16GB x 4) 58,990 Buy Now OWC Memory Upgrades For 27″ iMac with Retina 5K Display (Late 2015)64GBUp to 64GB memory2xUp to 2x more memory vs. factory optionsWorks with the following Model IDsiMac17,1 Rigorously in-house lab testedEasy DIY install videosOWC MaxRAM CertificationLifetime advanced replacement warranty