Crucial RAM 8GB DDR4 2400MHz CL17 Memory for Mac CT8G4S24AM

memory storage capacity: 8 Compatible for iMac (Retina 5K, 27-Inch, 2017) iMac18, 3 3.4 GHz or 3.5 GHz Intel Core i5 Every single module extensively tested at the component and module level Available in SODIMMs, RDIMMs and ECC UDIMMs; DIMM Type - Unbuffered Single Rank, x8 based module