Apple iMac G5 (20-inch, iSight) vs Apple iMac Pro (2017)

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iMac G5 (20-inch, iSight) compared with iMac Pro (2017)

	AppleiMac G5 (20-inch, iSight)	AppleiMac Pro (2017)
Overview
Released
Released	October 2005	December 2017
Performance
Processor
Processor	IBM PowerPC G5 2.1 GHz (iMac iSight)	Intel Xeon W-2140B, Intel Xeon W-2150B, Intel Xeon W-2170B or Intel Xeon W-2191B
CPU cores
CPU cores	1	8, 10, 14 or 18
Graphics
Graphics	ATI Radeon X600 XT (128 MB DDR)	Radeon Pro Vega 56 (8 GB HBM2), Radeon Pro Vega 64 (16 GB HBM2) or Radeon Pro Vega 64X (16 GB HBM2)
Memory
Memory	512 MB, 1 GB, 1.5 GB or 2.5 GB	32 GB, 64 GB, 128 GB or 256 GB (better)
Storage
Storage	250 GB to 500 GB	1 TB to 4 TB (better)
CPU
CPU	2.1 GHz PowerPC G5 with 512 KB L2 cache and 700 MHz frontside bus; single-core identity cross-checked with exact EveryMac source. Generic maker-clock chip record avoids borrowing uncertain silicon revision or unpublished thread/power figures.	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	ATI Radeon X600 XT with 128 MB dedicated DDR video memory; PCI Express.	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	533 MHz DDR2; 512 MB built in plus one expansion slot. Maker factory upgrades provide total capacities of 1, 1.5 or 2.5 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	250 GB 7200 rpm Serial ATA hard drive, configurable to 500 GB. Slot-loading 8x SuperDrive with 2.4x double-layer DVD writing, 4x DVD rewritable writing and 24x CD writing.	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	280 nits	500 nits (better)
Display type
Display type	TFT active-matrix LCD with millions of colours; typical contrast 800:1 and viewing angles of 170 degrees horizontal and vertical. Panel technology and refresh rate unpublished.	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	3 × 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 4
Wi-Fi
Wi-Fi	802.11g	802.11ac
Bluetooth
Bluetooth	2.0 + EDR	5.0
Camera
Camera	iSight camera	1080p FaceTime HD
Back ports
Back ports	Three USB 2.0 ports on the computer, plus two USB 1.1 ports on the keyboard; two FireWire 400 ports sharing 8 W, Mini-VGA output, Gigabit Ethernet, headphone/optical output and audio line-in.	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	Optional Mini-VGA adapters provide VGA mirroring or S-video/composite output; no DVI connector or extended-desktop mode is listed.	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
Camera
Camera	Built-in iSight; exact maker resolution is unpublished and omitted.	–
Speakers
Speakers	Built-in stereo speakers and microphone; 12 W digital amplifier.	Stereo speakers
Microphones
Microphones	–	Four microphones; supports Hey Siri
Keyboard and mouse
Keyboard and mouse	Apple Keyboard, Mighty Mouse and Apple Remote.	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	10 kg	9.7 kg (better)
Width × depth × height
Width × depth × height	493 × 189 × 472 mm	650 × 203 × 516 mm
Operating system
Operating system	macOS	macOS
Size and weight detail
Size and weight detail	Maker reference weight; actual weight varies with configuration and manufacturing process.	Dimensions include the stand; weight varies by configuration and manufacturing process. Optional VESA mount adapter kit.
Power supply
Power supply	Maximum continuous power 180 W; 100–240 V AC, 50–60 Hz.	100–240 V AC, 50–60 Hz, single phase
Materials
Materials	–	Recyclable aluminium enclosure; arsenic-free glass and mercury-free LED backlight
In the box
In the box	iMac G5, Apple Keyboard, Mighty Mouse, Apple Remote, power cord, install/restore DVDs and documentation; Mac OS X Tiger, iLife ’05, Front Row and Photo Booth. Apple announced availability the week after 12 October 2005; release remains October at month precision.	iMac Pro, space grey Magic Keyboard with Numeric Keypad, space grey Magic Mouse 2, Lightning to USB cable and power lead