Timetec - Memory of a lifetime Compatible with (But not Limited to):*Please click image for more compatible systems model iMac18,3 w/Retina 5K display (27-inch Mid 2017)(June 2017) A1419 3.4 GHz Core i5 (I5-7500) MNE92LL/A 3.5 GHz Core i5 (I5-7600) MNEA2LL/A 3.8 GHz Core i5 (I5-7600K) MNED2LL/A 4.2 GHz Core i7 (I7-7700K) BTO/CTO iMac 18,2 w/Retina 4K display (21.5-inch Mid 2017) (June 2017) A1418 3.0 GHz Core i5 (I5-7400) MNDY2LL/A 3.4 GHz Core i5 (I5-7500) MNE02LL/A 3.6 GHz Core i7 (I7-7700) BTO/CTO iMac 18,1 (21.5-inch Mid 2017) (June 2017) A1418 2.3 GHz Core i5 (I5-7360U) MMQA2LL/A Need to know if this part is compatible?Contact us with manufacturer and model information of your motherboard