Apple iMac G3 (Slot Loading, 1999) vs Apple iMac Pro (2017)

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iMac G3 (Slot Loading, 1999) compared with iMac Pro (2017)

	AppleiMac G3 (Slot Loading, 1999)	AppleiMac Pro (2017)
Overview
Released
Released	October 1999	December 2017
Performance
Processor
Processor	PowerPC G3 350 MHz (iMac) or PowerPC G3 400 MHz (iMac)	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 RAGE 128 VR (8 MB)	Radeon Pro Vega 56 (8 GB HBM2), Radeon Pro Vega 64 (16 GB HBM2) or Radeon Pro Vega 64X (16 GB HBM2)
Memory
Memory	64 MB, 128 MB or 512 MB	32 GB, 64 GB, 128 GB or 256 GB (better)
Storage
Storage	6 GB to 13 GB	1 TB to 4 TB (better)
CPU
CPU	350 MHz or 400 MHz PowerPC G3 with 100 MHz system bus and 512 KB backside L2 cache. Apple developer history gives 140/160 MHz cache clocks while EveryMac gives 200 MHz for the DV Special Edition; optional cache-clock fields are omitted. Exact processor supplier is not established.	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 RAGE 128 VR with 8 MB video memory and AGP support. Retained sheet says SGRAM while the developer note says SDRAM; memory technology is not silently selected.	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	PC100 SDRAM in two DIMM slots, up to 512 MB in the retained maker sheet. Base 350 MHz and DV models have 64 MB; DV Special Edition has 128 MB. Configurations retain each base and published maximum with its original processor and drive.	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	350 MHz: 6 GB ATA hard drive and slot-loading 24x CD-ROM, Blueberry. 400 MHz DV: 10 GB and 4x DVD-ROM, five fruit colours. 400 MHz DV Special Edition: 13 GB and 4x DVD-ROM, Graphite. These are configurations of one generation.	1 TB SSD, configurable to 2 or 4 TB
Display
Screen size
Screen size	15″	27″
Resolution
Resolution	1024 × 768	5120 × 2880 (better)
Panel
Panel	–	IPS LCD
Brightness
Brightness	–	500 nits
Refresh rate
Refresh rate	75 Hz	–
Display type
Display type	Nominal 15-inch CRT with 13.8-inch viewable diagonal; no fixed LCD native resolution.	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	Maximum mode 1024 × 768 at 75 Hz; 800 × 600 at 95 Hz and 640 × 480 at 117 Hz (EveryMac exact DV Special Edition specification).	Wide colour (P3); supports one billion colours
Connections
Ports
Ports	2 × USB-A, Ethernet, 2 × headphone jack	4 × Thunderbolt 3, 4 × USB-A, SD card slot, Ethernet, headphone jack
Ethernet
Ethernet	0.1 Gb/s	10 Gb/s (better)
External displays
External displays	–	Up to 4
Wi-Fi
Wi-Fi	–	802.11ac
Bluetooth
Bluetooth	–	5.0
Camera
Camera	–	1080p FaceTime HD
Back ports
Back ports	Two 12 Mbps USB ports on the computer, 10/100BASE-T Ethernet, 56K V.90 modem, audio line-in/out and two front headphone jacks. Two FireWire 400 ports and VGA video mirroring are present only on DV and DV Special Edition. AirPort card is optional across this generation.	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	DV and DV Special Edition mirror the internal display through VGA; the 350 MHz entry configuration has no external video connector.	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	Integrated Harman Kardon Odyssey stereo sound system and built-in microphone. Convection cooling uses no fan.	Stereo speakers
Microphones
Microphones	–	Four microphones; supports Hey Siri
Keyboard and mouse
Keyboard and mouse	Apple USB Keyboard and round Apple USB Mouse.	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	–	9.7 kg
Width × depth × height
Width × depth × height	–	650 × 203 × 516 mm
Operating system
Operating system	macOS	macOS
Size and weight detail
Size and weight detail	Retained Apple sheet gives height 15.8, width 15.2 and depth 17.6 inches, weight 34.7 pounds. Exact developer note gives height 39.5, width 38 and depth 44 cm and weight 15.5 kg (34 pounds). Disagreeing main dimensions and weight are omitted.	Dimensions include the stand; weight varies by configuration and manufacturing process. Optional VESA mount adapter kit.
Power supply
Power supply	–	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	Mac OS 8.6 at launch; TIME notes Mac OS 9 would begin shipping subsequently. Conservative October 1999 sale month follows the contemporary physical DV Special Edition reviews; the retained introduction day differs from the launch event date.	iMac Pro, space grey Magic Keyboard with Numeric Keypad, space grey Magic Mouse 2, Lightning to USB cable and power lead