Apple iMac (Retina 5K, 27-inch, 2020) vs Apple Mac Pro (M2 Ultra)

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iMac (Retina 5K, 27-inch, 2020) compared with Mac Pro (M2 Ultra)

	AppleiMac (Retina 5K, 27-inch, 2020)	AppleMac Pro (M2 Ultra)
Overview
Released
Released	August 2020	June 2023
Performance
Processor
Processor	Intel Core i5-10500, Intel Core i5-10600, Intel Core i9-10910 or Intel Core i7-10700K	Apple M2 Ultra
CPU cores
CPU cores	6, 8 or 10	24
CPU threads
CPU threads	12, 16 or 20	–
Graphics
Graphics	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)	60-core GPU or 76-core GPU
Memory
Memory	8 GB, 16 GB, 32 GB, 64 GB or 128 GB	64 GB, 128 GB or 192 GB (better)
Storage
Storage	256 GB to 8 TB	1 TB to 8 TB
CPU
CPU	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.	24-core CPU with 16 performance cores and 8 efficiency cores
GPU
GPU	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.	60-core or 76-core GPU; additional graphics cards and MPX modules are not supported
AI engine
AI engine	–	32-core Neural Engine
Memory bandwidth
Memory bandwidth	–	800 GB/s
Memory type
Memory type	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	Lower base: fixed 256 GB SSD. Middle base: 512 GB/1/2 TB SSD. Upper base: 512 GB/1/2/4/8 TB SSD.	1 TB SSD, configurable to 2 TB, 4 TB or 8 TB; two internal SATA connectors up to 6 Gb/s
Media engine
Media engine	–	Hardware-accelerated H.264, HEVC, ProRes and ProRes RAW; two video decode engines, four video encode engines and four ProRes encode and decode engines
Expansion slots
Expansion slots	–	Six full-length PCIe 4.0 slots (two x16 and four x8); one half-length x4 PCIe 3.0 slot with Apple I/O card installed; up to 300 W auxiliary power through two 75 W six-pin and one 150 W eight-pin connectors
Display
Screen size
Screen size	27″	None built in
Resolution
Resolution	5120 × 2880	–
Panel
Panel	IPS LCD	–
Brightness
Brightness	500 nits	–
Display type
Display type	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	Wide colour (P3), one billion colours and True Tone; standard glass or optional nano-texture glass	–
Connections
Ports
Ports	2 × Thunderbolt 3, 4 × USB-A, SD card slot, Ethernet, headphone jack	8 × Thunderbolt 4, 2 × USB-A, 2 × HDMI, 2 × Ethernet, headphone jack
Ethernet
Ethernet	1 Gb/s	10 Gb/s (better)
External displays
External displays	Up to 2	Up to 8 (better)
Wi-Fi
Wi-Fi	802.11ac	Wi-Fi 6E
Bluetooth
Bluetooth	5.0	5.3
Front ports
Front ports	–	Two Thunderbolt 4 ports on top of the tower or at the front of the rack enclosure
Camera
Camera	1080p FaceTime HD	–
Back ports
Back ports	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.	Six Thunderbolt 4 ports with DisplayPort, USB 4 up to 40 Gb/s and USB 3.1 Gen 2 up to 10 Gb/s; two USB-A up to 5 Gb/s; two HDMI; two 10 Gb Ethernet supporting 1, 2.5, 5 and 10 Gb/s; 3.5 mm jack with high-impedance headphone support; additional internal USB-A up to 5 Gb/s
External displays
External displays	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.	Up to eight displays at 4K 60 Hz, six at 6K 60 Hz or three at 8K 60 Hz; each HDMI port supports one at 8K 60 Hz or 4K 240 Hz, with VRR, HDR and multichannel audio
Speakers
Speakers	Stereo speakers	Built-in speaker; HDMI multichannel audio output
Microphones
Microphones	Three-mic array with directional beamforming; supports Hey Siri	–
Keyboard and mouse
Keyboard and mouse	Rechargeable Magic Keyboard and Magic Mouse 2; optional numeric keyboard and Magic Trackpad	Magic Keyboard with Touch ID and Numeric Keypad, Magic Mouse; optional Magic Trackpad
Design and power
Type
Type	All-in-one	Tower
Weight
Weight	8.92 kg (better)	16.86 kg
Width × depth × height
Width × depth × height	650 × 203 × 516 mm	218 × 450 × 529 mm
Operating system
Operating system	macOS	macOS
Size and weight detail
Size and weight detail	Dimensions include the stand; weight varies by configuration and manufacturing process. A built-in VESA mount version was also available.	Tower with feet is 529 × 218 × 450 mm and 16.86 kg; optional wheels increase height to 557 mm. Rack enclosure is 5U, 220.2 × 482 × 539.5 mm including handles (493.5 mm from fascia), and 17.21 kg; rack depth range 609.6–1,066.8 mm
Power supply
Power supply	100–240 V AC, 50–60 Hz, single phase	Built-in; maximum continuous power 1,280 W at 108–125 V or 220–240 V, or 1,180 W at 100–107 V
Materials
Materials	Recyclable, low-carbon aluminium enclosure; arsenic-free glass and mercury-free LED backlight	70% recycled aluminium in the enclosure
Colours
Colours	–	Silver
In the box
In the box	iMac, Magic Keyboard, Magic Mouse 2, power lead, Lightning to USB cable and polishing cloth	Mac Pro, Magic Keyboard with Touch ID and Numeric Keypad, Magic Mouse, 2 m power lead, 1 m USB-C charge cable; rack mount rails included with the rack enclosure, shipped separately