Model Detail - iMac PRO 27 inch 3.2 GHz 8 Core Xeon "W-2140B" 5K (Late 2017)

The iMac Core i5 3.8 GHz 27-Inch 5k Retina Screen (Mid 2017) is powered by a 14 nm Kaby Lake Quad Core 3.8GHz Intel 'Core i5' 7600K processor with a 6MB shared level 3 cache. This model sports dedicated Graphics thanks to a Radeon Pro 580 graphics processor including 8GB of GDDR5 graphics memory.

Base configuration comes with 4 memory slots with 8GB DDR4-2400 (PC4-19200) SDRAM installed as a pair of 4GB SODIMMs (with 2 slots empty), a 1TB Fusion hybrid drive, a "FaceTime HD" webcam and stereo speakers with no optical drive.

This model has a 27" 5120x2880 5k Retina LED 16:9 widescreen IPS display with a monolithic glass laminated LCD panel. The sleek aluminum housing of these models tapers to a slim 5mm edge around the screen perimeter with greater girth in the center of the unit.
Ports and connectivity come via 4 USB-c 3.0 ports, 2 being Thunderbolt ports, 1 Gigabit Ethernet, 802.11a/b/g/n/ac compatible and Bluetooth 4.2.

Download the manual from here.

Learn how to install Extra RAM here.

MAIN SPECS
Processor Speed 3.2 GHz
First Build Date 12/142017
Last Build Date N/A
Built-in Display 27
Model Identifier iMacPro1,1
Apple Order Number MQ2Y2LL/A/A
Apple Model Number A1862 (EMC 3144)
Form Factor 27" iMac Pro 2017
Apple Subfamily iMac Pro, Late 2017
EXPAND / UPGRADE
Standard RAM
32 GB (4X8GB) 64GB, 128GB offered for other models
Maximum RAM
128 GB -BUT, Apple semi-seals these machines. Grr...!
RAM Slots4 Slots
RAM SpecsPC4 21300 DDR4-2666 (288-pin)
RAM SpeedSpeed 2666 MHz
Standard Storage Drive
1 TB SSD (RAID Pair of Bare 512MB) - Apple Model 656-0061A
Maximum Storage Drive
2TB ($800) 4TB ($2800)
Storage Drive Interface Apple Proprietary Onboard NVMe Controller
SYSTEM
Processor Type 8 Core Xeon W-2140B (Underclocked Xeon W-2145)
Processors / Cores 1 (4 Cores)
Geekbench Rating 30524
Turbo Boost Speed 4.2 GHz
Custom Speeds N/A
Architecture 64-Bit
Processor Upgradeable Possibly...
FPU Integrated
Integrated System RAM None
Standard RAM 32 GB (4X8GB) 64GB, 128GB offered for other models
Maximum RAM 128 GB -BUT, Apple semi-seals these machines. Grr...!
RAM Slots 4 Slots
RAM Specs PC4 21300 DDR4-2666 (288-pin)
RAM Speed Speed 2666 MHz
System Bus Speed QPI (QuickPath Interconnect)
Cache Bus Speed Speed 3.2 GHz (Built-in)
ROM / Firmware Type EFI
EFI Architecture 64-Bit
L1 Cache 32k/32k x8
L2 / L3 Cache 8MB L2, 11 MB L3 for 19MB Total
VIDEO / GRAPHICS
Video Card Radeon Pro Vega 56
VRAM Type HBM (High Bandwidth Memory)
Standard VRAM 8 GB
Maximum VRAM 16 GB at time of purchase
Native Resolution 5120x2880
Multi Display Support Dual/ Mirroring
Multi Display Max Resolution Up to TWO external displays @ 5120x2880
STORAGE
Standard Storage Drive 1 TB SSD (RAID Pair of Bare 512MB) - Apple Model 656-0061A
Maximum Storage Drive 2TB ($800) 4TB ($2800)
Storage Drive Interface Apple Proprietary Onboard NVMe Controller
Optical Disk None
Floppy / Zip Drive None
Ports
AirPort 802.11ac
Bluetooth 4.2
Video / Multi-IO 4 (Thunderbolt)
Thunderbolt Ports / Spec 4 (TB3/ 40Gb) USB-C
USB Ports / Spec 4 (3.0)
Firewire Ports / Spec None
Ethernet (RJ-45) 10Gb Nbase-T
Modem (RJ-11) None
Headphone 1
Microphone 4 (Built-in)
Audio In 1
Audio Out 1
Keyboard Apple Wireless Keyboard
Mouse / Trackpad Magic Mouse 2/Trackpad
Expansion Slots SDXC (UHS-II) SD Card
Expansion Bays None
LEGACY PORTS
SCSI None
S-Video Input None
S-Video Output None
Floppy None
ADB None
Serial None
Geoport None
OPERATING SYSTEM
Pre-Installed MacOS X 10.13.2 (17C2111)
Maximum MacOS Current
MacOS 9 Support None
Windows Support Boot/ Virtualization
Minimum Windows 10 (64-Bit)
Maximum Windows 10 (64-Bit)
POWER
Battery Type N/A
Battery Life N/A
Power Adapter None
PHYSICAL
Case Type All-in-One
Dimensions 20.3 x 25.6 x 8
Weight 21 lbs. (9.54 kg)
Original Price USD (US) $4999
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