Apple iMac G5 (20-inch, 2004) vs Apple iMac (Retina 4K, 21.5-inch, 2019)

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iMac G5 (20-inch, 2004) compared with iMac (Retina 4K, 21.5-inch, 2019)

	AppleiMac G5 (20-inch, 2004)	AppleiMac (Retina 4K, 21.5-inch, 2019)
Overview
Released
Released	September 2004	March 2019
Performance
Processor
Processor	IBM PowerPC G5 1.8 GHz (iMac 2004)	Intel Core i3-8100, Intel Core i7-8700 or Intel Core i5-8500
CPU cores
CPU cores	1	4 or 6
CPU threads
CPU threads	–	4, 6 or 12
Graphics
Graphics	NVIDIA GeForce FX 5200 Ultra (64 MB)	Radeon Pro 555X (2 GB GDDR5), Radeon Pro 560X (4 GB GDDR5) or Radeon Pro Vega 20 (4 GB HBM2)
Memory
Memory	256 MB or 2 GB	8 GB, 16 GB or 32 GB (better)
Storage
Storage	160 GB to 250 GB	256 GB to 1 TB (better)
CPU
CPU	1.8 GHz PowerPC G5 with 600 MHz frontside bus and 512 KB on-chip L2 cache. Generic maker-clock chip record retains the single-core identity; uncertain silicon revision is not inferred.	3.6 GHz quad-core Core i3 without Turbo Boost, or 3.0 GHz six-core Core i5 with Turbo Boost up to 4.1 GHz; both configurable to 3.2 GHz six-core Core i7 with Turbo Boost up to 4.6 GHz
GPU
GPU	NVIDIA GeForce FX 5200 Ultra with 64 MB dedicated DDR video memory and AGP 8x support.	Radeon Pro 555X with 2 GB GDDR5 in the lower base; Radeon Pro 560X with 4 GB GDDR5 in the upper base, configurable to Radeon Pro Vega 20 with 4 GB HBM2
Memory type
Memory type	256 MB PC3200 (400 MHz) DDR SDRAM standard, expandable to 2 GB in two slots. Configurations conservatively list the published base and maker maximum.	8 GB standard, configurable to 16/32 GB; lower base uses 2400 MHz DDR4 and upper base 2666 MHz DDR4. Memory is not readily user-accessible.
Storage type
Storage type	160 GB 7200 rpm Serial ATA hard drive, with a 250 GB build-to-order option confirmed by maker launch press. Slot-loading SuperDrive DVD-R/CD-RW writes DVD-R at 4x and reads DVDs at 8x; writes CD-R at 16x and CD-RW at 8x.	The current Apple sheet lists 256 GB SSD or 1 TB Fusion Drive for both bases, and these are the configurations shown. Apple made SSD storage standard in August 2020. Launch reviews describe a 1 TB hard drive in the lower base and 1 TB Fusion Drive in the upper base, with larger SSD options (Macworld and TechRadar); these historical options are not flattened into the current matrix.
Display
Screen size
Screen size	20″	21.5″
Resolution
Resolution	1680 × 1050	4096 × 2304 (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 4K display; IPS panel confirmed by EveryMac; Apple does not publish native refresh rate in this model’s specification sheet
Display features
Display features	Typical viewing angles: 170° horizontal and vertical.	Wide colour (P3); supports one billion colours
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	–	4.2
Camera
Camera	–	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/optical digital audio output and audio line-in. AirPort Extreme 802.11g card and internal Bluetooth module 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; SDXC, Gigabit Ethernet and 3.5 mm headphone jack; Kensington lock slot. Thunderbolt 2, HDMI, DVI and VGA require separately sold 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.	Built-in display at full native resolution alongside one 5120 × 2880 display at 60 Hz with one billion colours, two 3840 × 2160 displays at 60 Hz with one billion colours, or two 4096 × 2304 displays at 60 Hz with millions of colours
Speakers
Speakers	Built-in stereo speakers, internal 12 W digital amplifier and built-in microphone.	Stereo speakers
Microphones
Microphones	–	Built-in microphone
Keyboard and mouse
Keyboard and mouse	Apple Keyboard, Apple Mouse and modem cable.	Rechargeable Magic Keyboard and Magic Mouse 2; optional Magic Keyboard with Numeric Keypad and Magic Trackpad 2
Design and power
Type
Type	All-in-one	All-in-one
Weight
Weight	11.4 kg	5.48 kg (better)
Width × depth × height
Width × depth × height	493 × 189 × 472 mm	528 × 175 × 450 mm
Operating system
Operating system	macOS	macOS
Size and weight detail
Size and weight detail	Published metric size and reference weight; weight varies by configuration and manufacturing process.	Dimensions include the stand; current Apple sheet lists 5.48 kg and warns that weight varies by configuration. Launch reviews tested heavier hard-drive/Fusion configurations. A built-in VESA mount version was also available.
Power supply
Power supply	100–120 V AC or 100–240 V AC depending on country of purchase, 47–63 Hz, single phase; maximum continuous power 180 W.	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	Launch Mac OS X 10.3 Panther, iLife ’04 and bundled productivity software, with Classic environment support. The retained specification lists the later iLife ’05 bundle. Apple announced the model on 31 August 2004 and stated worldwide shipping would begin in mid-September; the release field therefore retains September month precision.	iMac, Magic Keyboard, Magic Mouse 2, power lead and Lightning to USB cable