Apple iMac 24″ (M1) vs Apple iMac G4 (20-inch, USB 2.0)

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iMac 24″ (M1) compared with iMac G4 (20-inch, USB 2.0)

	AppleiMac 24″ (M1)	AppleiMac G4 (20-inch, USB 2.0)
Overview
Released
Released	May 2021	November 2003
Performance
Processor
Processor	Apple M1	Motorola PowerPC G4 1.25 GHz (iMac USB 2.0)
CPU cores
CPU cores	8	1
Graphics
Graphics	7-core GPU or 8-core GPU	NVIDIA GeForce FX 5200 Ultra (64 MB)
Memory
Memory	8 GB or 16 GB (better)	256 MB, 512 MB or 1 GB
Storage
Storage	256 GB to 2 TB (better)	80 GB to 160 GB
CPU
CPU	8-core CPU with 4 performance cores and 4 efficiency cores	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.
GPU
GPU	7-core GPU in the two-port model; 8-core GPU in the four-port model	NVIDIA GeForce FX 5200 Ultra with 64 MB dedicated DDR video memory and AGP 4x support.
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.
AI engine
AI engine	16-core Neural Engine	–
Storage type
Storage type	SSD; two-port model configurable to 512 GB or 1 TB, four-port model to 512 GB, 1 TB or 2 TB	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.
Display
Screen size
Screen size	24″	20″
Resolution
Resolution	4480 × 2520 (better)	1680 × 1050
Panel
Panel	IPS LCD	–
Refresh rate
Refresh rate	60 Hz	–
Brightness
Brightness	500 nits (better)	230 nits
Display type
Display type	4.5K Retina display; actual diagonal 23.5 inches; IPS panel and 60 Hz refresh rate confirmed by Notebookcheck	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.
Pixel density
Pixel density	218 ppi	–
Display features
Display features	1 billion colours; wide colour (P3); True Tone; anti-reflective coating	Typical viewing angles: 170° horizontal and vertical; articulated display arm adjusts height and angle.
Connections
Ports
Ports	2 × USB4, headphone jack	3 × USB-A, Ethernet, headphone jack
Ethernet
Ethernet	–	0.1 Gb/s
External displays
External displays	Up to 1	–
Wi-Fi
Wi-Fi	Wi-Fi 6	–
Bluetooth
Bluetooth	5.0	–
Camera
Camera	1080p FaceTime HD	–
Back ports
Back ports	Two-port model: two Thunderbolt / USB 4 ports with DisplayPort, Thunderbolt 3 and USB 4 up to 40 Gb/s, and USB 3.1 Gen 2 up to 10 Gb/s; optional Gigabit Ethernet. Four-port model adds two USB 3 ports up to 10 Gb/s and includes Gigabit Ethernet. Both have a 3.5 mm headphone jack.	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.
External displays
External displays	One external display up to 6K 60 Hz, alongside the built-in display at full resolution	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.
Camera
Camera	1080p FaceTime HD camera; advanced image signal processor with computational video	The external iSight shown in the product image is an optional accessory; this iMac has no integrated camera.
Speakers
Speakers	High-fidelity six-speaker system with force-cancelling woofers; wide stereo sound; spatial audio with Dolby Atmos	Built-in speaker and microphone, Apple Pro Speakers rated at 7 W each and internal 14 W amplifier.
Microphones
Microphones	Studio-quality three-mic array with high signal-to-noise ratio and directional beamforming; Hey Siri	–
Keyboard and mouse
Keyboard and mouse	Magic Mouse and Magic Keyboard; keyboard has Touch ID on the four-port model and optionally on the two-port model; Magic Trackpad and Magic Keyboard with Touch ID and Numeric Keypad available instead	Apple Keyboard, Apple Mouse, Apple Pro Speakers and modem cable. Wireless Keyboard and Wireless Mouse were optional accessories.
Design and power
Type
Type	All-in-one	All-in-one
Weight
Weight	4.46 kg (better)	18.2 kg
Width × depth × height
Width × depth × height	547 × 147 × 461 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.
Power supply
Power supply	143 W external power adapter with magnetic connection; Gigabit Ethernet built into the adapter where fitted	90–264 V AC, 47–63 Hz, single phase; maximum continuous power 190 W.
Noise
Noise	7 dBA sound pressure at idle and during Apple's wireless web test (operator position)	–
Materials
Materials	Recyclable, low-carbon aluminium enclosure	–
Colours
Colours	Two-port model: Blue, Green, Pink, Silver. Four-port model also comes in Yellow, Orange and Purple.	–
In the box
In the box	iMac, Magic Keyboard, Magic Mouse, 143 W power adapter, 2 m power lead, USB-C to Lightning cable	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.