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The iMac “Core i7” 4.2 27-Inch Aluminum (Retina 5K, Mid-2017/Kaby Lake) features a 14-nm “Kaby Lake” 4.2 GHz Intel “Core i7” processor (7700K) with four independent processor “cores” on a single chip, an 8 MB shared level 3 cache, 64 GB of easy to upgrade 2400 MHz DDR4 SDRAM, a 2 TB HDD + 128GB SSD “Fusion” drive, and either a Radeon Pro 575 graphics processor with 4 GB of VRAM or a Radeon Pro 580 graphics processor with 8 GB of VRAM. It also has a built-in “FaceTime HD” webcam and stereo speakers.
This model has a 27″ 5120×2880 LED-backlit 16:9 widescreen IPS DCI-P3 “Retina 5K” display. The rear of the case is aluminum and is thicker in the middle and tapers to a razor thin 5 mm at the edges.
TECH SPECS
| Processor Speed: | 4.2 GHz | Processor Type: | Core i7 (I7-7700K) |
| Turbo Boost: | 4.5 GHz | Custom Speeds: | N/A |
| Processor Upgrade: | LGA 1151* | FPU: | Integrated |
| System Bus Speed: | 8 GT/s (DMI3)* | Cache Bus Speed: | 4.2 GHz (Built-in) |
| ROM/Firmware Type: | EFI | EFI Architecture: | 64-Bit |
| L1 Cache: | 32k/32k | L2/L3 Cache: | 256k x2, 8 MB |
| RAM Type: | PC4-19200 DDR4* | Min. RAM Speed: | 2400 MHz |
| Standard RAM: | 32 GB | Maximum RAM: | 64 GB* |
| Motherboard RAM: | None | RAM Slots: | 4 |
| Video Card: | Radeon Pro 575/580* | VRAM Type: | Dedicated |
| Standard VRAM: | 4, 8 GB* | Maximum VRAM: | 8 GB |
| Built-in Display: | 27″ 16:9 Widescreen | Native Resolution: | 5120×2880 |
| 2nd Display Support: | Dual/Mirroring* | 2nd Max. Resolution: | 3840×2160 x2 |
| Standard Storage: | 2 TB* (Fusion) | Std. Storage Speed: | N/A |
| Storage Dimensions: | 3.5″ (7 mm)* | Storage Interface: | Serial ATA (6 Gb/s)* |
| Standard Optical: | None* | Standard Disk: | None |
| Standard Modem: | None | Standard Ethernet: | 10/100/1000Base-T |
| Standard AirPort: | 802.11ac* | Standard Bluetooth: | 4.2 |
| USB Ports: | 4 (3.0) | Firewire Ports: | None |
| Expansion Slots: | SDXC SD Card | Expansion Bays: | None |
| Incl. Keyboard: | Magic Keyboard* | Incl. Input: | Magic Mouse 2* |
| Case Type: | All-in-One | Form Factor: | 27″ iMac Tapered Edge |
| Apple Order No: | BTO/CTO | Apple Subfamily: | Retina 5K, Mid-2017 |
| Apple Model No: | A1419 (EMC 3070) | Model ID: | iMac18,3 |
| Battery Type: | N/A | Battery Life: | N/A |
| Pre-Installed MacOS: | X 10.12.4 (16F2073) | Maximum MacOS: | Current |
| Minimum Windows: | 10 (64-Bit)* | Maximum Windows: | 10 (64-Bit)* |
| MacOS 9 Support: | None | Windows Support: | Boot/Virtualization |
| Dimensions: | 20.3 x 25.6 x 8 | Avg. Weight: | 21 lbs. (9.54 kg) |
