Apple iMac G4 (20-inch, USB 2.0) vs Apple iMac (Retina 5K, 27-inch, 2020)

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iMac G4 (20-inch, USB 2.0) compared with iMac (Retina 5K, 27-inch, 2020)

	AppleiMac G4 (20-inch, USB 2.0)	AppleiMac (Retina 5K, 27-inch, 2020)
Overview
Released
Released	November 2003	August 2020
Performance
Processor
Processor	Motorola PowerPC G4 1.25 GHz (iMac USB 2.0)	Intel Core i5-10500, Intel Core i5-10600, Intel Core i9-10910 or Intel Core i7-10700K
CPU cores
CPU cores	1	6, 8 or 10
CPU threads
CPU threads	–	12, 16 or 20
Graphics
Graphics	NVIDIA GeForce FX 5200 Ultra (64 MB)	Radeon Pro 5300 (4 GB GDDR6), Radeon Pro 5500 XT (8 GB GDDR6), Radeon Pro 5700 (8 GB GDDR6) or Radeon Pro 5700 XT (16 GB GDDR6)
Memory
Memory	256 MB, 512 MB or 1 GB	8 GB, 16 GB, 32 GB, 64 GB or 128 GB (better)
Storage
Storage	80 GB to 160 GB	256 GB to 8 TB (better)
CPU
CPU	1.25 GHz PowerPC G4 with 167 MHz system bus and 256 KB on-chip L2 cache. Generic maker-clock record retains the single-core identity cross-checked with the exact EveryMac source; uncertain silicon revision is not inferred.	Six-core Core i5 at 3.1 GHz (Turbo Boost 4.5 GHz) or 3.3 GHz (4.8 GHz), or eight-core Core i7 at 3.8 GHz (5.0 GHz). Upper two bases configurable to 3.6 GHz ten-core Core i9 (5.0 GHz). Exact CPU identities follow Geekbench. Apple specifies a 5.0 GHz Core i7 limit in this iMac, while Intel lists 5.1 GHz for the chip itself.
GPU
GPU	NVIDIA GeForce FX 5200 Ultra with 64 MB dedicated DDR video memory and AGP 4x support.	Radeon Pro 5300 with 4 GB GDDR6 on the two Core i5 bases. Upper base has Radeon Pro 5500 XT with 8 GB GDDR6, optionally Radeon Pro 5700 with 8 GB or 5700 XT with 16 GB GDDR6.
Memory type
Memory type	256 MB PC2700 (333 MHz) DDR SDRAM standard; factory options 512 MB or 1 GB. One 184-pin DIMM and one user-accessible SO-DIMM slot. Configurations retain Apple's supported 1 GB maximum, not unofficial upgrade limits.	2666 MHz DDR4; 8 GB standard as two 4 GB modules. Four user-accessible SO-DIMM slots; configurable to 16/32/64/128 GB on every base.
Storage type
Storage type	80 GB 7200 rpm Ultra ATA/100 hard drive, configurable to 160 GB; 4x SuperDrive DVD-R/CD-RW. Published memory and storage factory options are retained for the 1.25 GHz processor.	Lower base: fixed 256 GB SSD. Middle base: 512 GB/1/2 TB SSD. Upper base: 512 GB/1/2/4/8 TB SSD.
Display
Screen size
Screen size	20″	27″
Resolution
Resolution	1680 × 1050	5120 × 2880 (better)
Panel
Panel	–	IPS LCD
Brightness
Brightness	230 nits	500 nits (better)
Display type
Display type	Widescreen TFT active-matrix LCD with millions of colours and typical 350:1 contrast. Panel technology and refresh rate are not published in the exact maker sheet.	LED-backlit Retina 5K display; IPS panel confirmed by EveryMac. Apple does not publish native refresh rate in the specification sheet.
Display features
Display features	Typical viewing angles: 170° horizontal and vertical; articulated display arm adjusts height and angle.	Wide colour (P3), one billion colours and True Tone; standard glass or optional nano-texture glass
Connections
Ports
Ports	3 × USB-A, Ethernet, headphone jack	2 × Thunderbolt 3, 4 × USB-A, SD card slot, Ethernet, headphone jack
Ethernet
Ethernet	0.1 Gb/s	1 Gb/s (better)
External displays
External displays	–	Up to 2
Wi-Fi
Wi-Fi	–	802.11ac
Bluetooth
Bluetooth	–	5.0
Camera
Camera	–	1080p FaceTime HD
Back ports
Back ports	Three USB 2.0 ports on the computer, up to 480 Mbps, plus two USB 1.1 ports on the keyboard; two FireWire 400 ports with 8 W shared power, Mini-VGA, 10/100BASE-T Ethernet, 56K V.92 modem, headphone jack, Apple speaker minijack and audio line-in. AirPort Extreme 802.11g card and internal Bluetooth are optional, rather than standard.	Four USB-A ports; two Thunderbolt 3 USB-C ports with DisplayPort, Thunderbolt up to 40 Gb/s and USB 3.1 Gen 2 up to 10 Gb/s; UHS-II SDXC, Gigabit Ethernet and 3.5 mm headphone jack; Kensington lock slot. Optional 10Gb Ethernet supports 1/2.5/5/10Gb connections. Thunderbolt 2, HDMI, DVI and VGA require adapters.
External displays
External displays	Mini-VGA provides video mirroring on a VGA display or S-video/composite television through optional adapters. Output resolutions: 640 × 480 at 60 Hz, 800 × 600 at 75 Hz or 1024 × 768 at 75 Hz.	One 6K or 5K external display, or two 4K displays; two 6K displays require Radeon Pro 5700 or 5700 XT. All listed external modes run at 60 Hz.
Camera
Camera	The external iSight shown in the product image is an optional accessory; this iMac has no integrated camera.	–
Speakers
Speakers	Built-in speaker and microphone, Apple Pro Speakers rated at 7 W each and internal 14 W amplifier.	Stereo speakers
Microphones
Microphones	–	Three-mic array with directional beamforming; supports Hey Siri
Keyboard and mouse
Keyboard and mouse	Apple Keyboard, Apple Mouse, Apple Pro Speakers and modem cable. Wireless Keyboard and Wireless Mouse were optional accessories.	Rechargeable Magic Keyboard and Magic Mouse 2; optional numeric keyboard and Magic Trackpad
Design and power
Type
Type	All-in-one	All-in-one
Weight
Weight	18.2 kg	8.92 kg (better)
Width × depth × height
Width × depth × height	–	650 × 203 × 516 mm
Operating system
Operating system	macOS	macOS
Size and weight detail
Size and weight detail	Adjustable maker ranges: height 354–530 mm, width 440–514 mm and depth 270–440 mm; base diameter 270 mm. Reference weight varies by configuration and manufacturing process.	Dimensions include the stand; weight varies by configuration and manufacturing process. A built-in VESA mount version was also available.
Power supply
Power supply	90–264 V AC, 47–63 Hz, single phase; maximum continuous power 190 W.	100–240 V AC, 50–60 Hz, single phase
Materials
Materials	–	Recyclable, low-carbon aluminium enclosure; arsenic-free glass and mercury-free LED backlight
In the box
In the box	Mac OS X 10.3 Panther and iLife, with Apple's productivity software and Tony Hawk's Pro Skater 4. Maker launch confirms immediate availability on 18 November 2003.	iMac, Magic Keyboard, Magic Mouse 2, power lead, Lightning to USB cable and polishing cloth