![2015 27″ iMac 5K (R9 M390) [6th,4C] + Radeon VII @ 16Gbps-TB2>TB3 (Razer Core X) + macOS 10.15.2 [Koncept_Zero] | External GPU Builds 2015 27″ iMac 5K (R9 M390) [6th,4C] + Radeon VII @ 16Gbps-TB2>TB3 (Razer Core X) + macOS 10.15.2 [Koncept_Zero] | External GPU Builds](https://i.imgur.com/CgOtrfW.jpg)
2015 27″ iMac 5K (R9 M390) [6th,4C] + Radeon VII @ 16Gbps-TB2>TB3 (Razer Core X) + macOS 10.15.2 [Koncept_Zero] | External GPU Builds
![Apple iMac with 5K Retina display (27-inch) review: Apple's 5K iMac impresses expert eyes (review) - CNET Apple iMac with 5K Retina display (27-inch) review: Apple's 5K iMac impresses expert eyes (review) - CNET](https://www.cnet.com/a/img/resize/54115308cc0cb6c2f04bb4426e4fbc3275fdd322/hub/2014/10/17/8a4bc5f9-5b42-473d-9356-9391342ecb38/apple-imac-retina-5k-display-7861-008.jpg?auto=webp&fit=crop&height=675&width=1200)
Apple iMac with 5K Retina display (27-inch) review: Apple's 5K iMac impresses expert eyes (review) - CNET
![2015 iMac Reviews: 'Best All-in-One' Desktop, But Lacks USB-C and Fusion Drive Isn't Standard - MacRumors 2015 iMac Reviews: 'Best All-in-One' Desktop, But Lacks USB-C and Fusion Drive Isn't Standard - MacRumors](https://images.macrumors.com/t/sjHpKdFUPjebQrdoL5m4qe7Z2-8=/1600x/article-new/2015/10/iMac-4K-5K-2015.jpg)
2015 iMac Reviews: 'Best All-in-One' Desktop, But Lacks USB-C and Fusion Drive Isn't Standard - MacRumors
![Apple iMac with 4K Retina display (21.5-inch, 2015) review: Apple packs more pixels into its smallest iMac - CNET Apple iMac with 4K Retina display (21.5-inch, 2015) review: Apple packs more pixels into its smallest iMac - CNET](https://www.cnet.com/a/img/resize/c0f83eedacd1312de7bff3d50ab303212711d26c/hub/2015/10/09/54f1edc6-361b-4d74-be8f-b80c9272e8f2/apple-imac-with-4k-retina-display-21-5-inch-2015-22.jpg?auto=webp&fit=crop&height=1200&width=1200)