Apple iMac (20-inch, Early 2009) vs Apple iMac Pro (2017)

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iMac (20-inch, Early 2009) compared with iMac Pro (2017)

	AppleiMac (20-inch, Early 2009)	AppleiMac Pro (2017)
Overview
Released
Released	March 2009	December 2017
Performance
Processor
Processor	Intel Core 2 Duo E8135	Intel Xeon W-2140B, Intel Xeon W-2150B, Intel Xeon W-2170B or Intel Xeon W-2191B
CPU cores
CPU cores	2	8, 10, 14 or 18
Graphics
Graphics	NVIDIA GeForce 9400M (256 MB shared DDR3)	Radeon Pro Vega 56 (8 GB HBM2), Radeon Pro Vega 64 (16 GB HBM2) or Radeon Pro Vega 64X (16 GB HBM2)
Memory
Memory	2 GB, 4 GB or 8 GB	32 GB, 64 GB, 128 GB or 256 GB (better)
Storage
Storage	320 GB to 1 TB	1 TB to 4 TB (better)
CPU
CPU	2.66 GHz Intel Core 2 Duo E8135 with 6 MB shared L2 cache and 1066 MHz frontside bus; exact chip identity cross-checked with EveryMac	Xeon W at 3.2 GHz with 8 cores (Turbo Boost 4.2 GHz), 3.0 GHz with 10 cores (4.5 GHz), 2.5 GHz with 14 cores (4.3 GHz) or 2.3 GHz with 18 cores (4.3 GHz). Exact W-B CPU identities follow Geekbench. The 8/10-core versions launched first; Macworld reports later January 2018 availability for 14/18-core options. Apple changed the standard configuration to 10 cores in August 2020.
GPU
GPU	NVIDIA GeForce 9400M with at least 256 MB DDR3 shared with system memory; available system memory varies with graphics requirements	Radeon Pro Vega 56 with 8 GB HBM2, optionally Vega 64 or Vega 64X with 16 GB HBM2. Vega 64X is a later option included in Apple’s current specification sheet, absent from the launch reviews.
Memory type
Memory type	Two user-accessible SO-DIMM slots for 1066 MHz DDR3; 2 GB standard, factory upgrades to 4 or 8 GB	Quad-channel 2666 MHz DDR4 ECC; 32 GB standard, configurable to 64/128/256 GB. The current maker sheet includes the later 256 GB option; launch reviews cover up to 128 GB. No user-accessible memory door.
Storage type
Storage type	320 GB 7200 rpm Serial ATA hard drive, configurable to 640 GB or 1 TB; slot-loading 8x SuperDrive with 4x double-layer DVD burning	1 TB SSD, configurable to 2 or 4 TB
Display
Screen size
Screen size	20″	27″
Resolution
Resolution	1680 × 1050	5120 × 2880 (better)
Panel
Panel	–	IPS LCD
Brightness
Brightness	290 nits	500 nits (better)
Display type
Display type	Glossy widescreen TFT active-matrix LCD, millions of colours; maker typical brightness 290 cd/m², contrast 800:1 and 160° horizontal/vertical viewing angle. Panel technology and refresh rate unpublished and omitted.	LED-backlit Retina 5K display; IPS panel confirmed by EveryMac. Native refresh rate omitted because Apple does not publish it in the specification sheet.
Display features
Display features	–	Wide colour (P3); supports one billion colours
Connections
Ports
Ports	DisplayPort, 4 × USB-A, Ethernet, headphone jack	4 × Thunderbolt 3, 4 × USB-A, SD card slot, Ethernet, headphone jack
Ethernet
Ethernet	1 Gb/s	10 Gb/s (better)
External displays
External displays	Up to 1	Up to 4 (better)
Wi-Fi
Wi-Fi	802.11n draft	802.11ac
Bluetooth
Bluetooth	2.1 + EDR	5.0
Camera
Camera	iSight camera	1080p FaceTime HD
Back ports
Back ports	Four USB 2.0 ports on the computer, plus two on the supplied wired keyboard; one FireWire 800 port at 7 W, Mini DisplayPort output, Gigabit Ethernet, headphone/optical digital output and line-in/optical digital input. FireWire and audio input described here; no SD slot.	Four USB-A ports; four Thunderbolt 3 USB-C ports with DisplayPort 1.2, Thunderbolt up to 40 Gb/s and USB 3.1 Gen 2 up to 10 Gb/s; UHS-II SDXC, Nbase-T Ethernet supporting 1/2.5/5/10Gb and 3.5 mm headphone jack. Thunderbolt 2, HDMI, DVI and VGA require adapters.
External displays
External displays	Full built-in resolution and one external display up to 2560 × 1600 simultaneously; extended desktop and mirroring, optional DVI/VGA/dual-link DVI adapters	Two 5120 × 2880 displays at 60 Hz with one billion colours, four 3840 × 2160 displays at 60 Hz with one billion colours, or four 4096 × 2304 displays at 60 Hz with millions of colours, alongside the built-in display
Speakers
Speakers	Built-in stereo speakers with internal 24 W digital amplifier, microphone and support for Apple Stereo Headset microphones	Stereo speakers
Microphones
Microphones	–	Four microphones; supports Hey Siri
Keyboard and mouse
Keyboard and mouse	Apple Keyboard and Mighty Mouse; numeric-keypad keyboard, wireless keyboard or wireless Mighty Mouse available as options	Space grey Magic Keyboard with Numeric Keypad and Magic Mouse 2; optional space grey Magic Trackpad 2
Design and power
Type
Type	All-in-one	All-in-one
Weight
Weight	9.1 kg (better)	9.7 kg
Width × depth × height
Width × depth × height	485 × 189 × 469 mm	650 × 203 × 516 mm
Operating system
Operating system	macOS	macOS
Size and weight detail
Size and weight detail	–	Dimensions include the stand; weight varies by configuration and manufacturing process. Optional VESA mount adapter kit.
Power supply
Power supply	Maximum continuous power 200 W; 100–240 V AC, 50–60 Hz single phase	100–240 V AC, 50–60 Hz, single phase
Materials
Materials	Aluminium and glass enclosure with arsenic-free display glass, BFR-free components and PVC-free internal cables	Recyclable aluminium enclosure; arsenic-free glass and mercury-free LED backlight
In the box
In the box	iMac, Apple Keyboard, Mighty Mouse, cleaning cloth, power cord, install/restore DVDs and documentation; Mac OS X Leopard and iLife '09	iMac Pro, space grey Magic Keyboard with Numeric Keypad, space grey Magic Mouse 2, Lightning to USB cable and power lead