Apple iMac G5 (20-inch, iSight) vs Apple Power Mac G5 (Late 2005)

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iMac G5 (20-inch, iSight) compared with Power Mac G5 (Late 2005)

	AppleiMac G5 (20-inch, iSight)	ApplePower Mac G5 (Late 2005)
Overview
Released
Released	October 2005	October 2005
Performance
Processor
Processor	IBM PowerPC G5 2.1 GHz (iMac iSight)	PowerPC G5 dual-core 2000 MHz (Power Mac Late 2005), PowerPC G5 dual-core 2300 MHz (Power Mac Late 2005) or 2 × PowerPC G5 dual-core 2500 MHz (Power Mac Late 2005)
CPU cores
CPU cores	1	2 or 4
Graphics
Graphics	ATI Radeon X600 XT (128 MB DDR)	NVIDIA GeForce 6600 LE (128 MB) or NVIDIA GeForce 6600 (256 MB)
Memory
Memory	512 MB, 1 GB, 1.5 GB or 2.5 GB	512 MB or 16 GB (better)
Storage
Storage	250 GB to 500 GB (better)	160 GB to 250 GB
CPU
CPU	2.1 GHz PowerPC G5 with 512 KB L2 cache and 700 MHz frontside bus; single-core identity cross-checked with exact EveryMac source. Generic maker-clock chip record avoids borrowing uncertain silicon revision or unpublished thread/power figures.	Dual models have one physical dual-core PowerPC G5 at 2 or 2.3 GHz. Quad has two physical dual-core processors at 2.5 GHz, four cores in total. Each core has 1 MB L2 cache. Front-side bus per physical processor is 1, 1.15 or 1.25 GHz respectively. Macworld’s exact Quad review describes its liquid cooling.
GPU
GPU	ATI Radeon X600 XT with 128 MB dedicated DDR video memory; PCI Express.	Stock dual-core 2 GHz: NVIDIA GeForce 6600 LE with 128 MB GDDR SDRAM. Dual-core 2.3 GHz and Quad: NVIDIA GeForce 6600 with 256 MB GDDR SDRAM. Optional NVIDIA GeForce 7800 GT 256 MB and Quadro FX 4500 512 MB; the Quadro occupies the graphics slot and adjacent x4 slot.
Memory type
Memory type	533 MHz DDR2; 512 MB built in plus one expansion slot. Maker factory upgrades provide total capacities of 1, 1.5 or 2.5 GB.	Stock 512 MB PC2-4200 DDR2 at 533 MHz, installed in matched pairs. Up to 16 GB supported; ECC configurations available from 1 GB. Rows retain the stock drive and graphics at base and maximum supported memory.
Storage type
Storage type	250 GB 7200 rpm Serial ATA hard drive, configurable to 500 GB. Slot-loading 8x SuperDrive with 2.4x double-layer DVD writing, 4x DVD rewritable writing and 24x CD writing.	Stock 160 GB on dual-core 2 GHz and 250 GB on dual-core 2.3 GHz and Quad. 7200 rpm Serial ATA drives; two internal bays. Optional one or two 500 GB drives. One optical bay with 16x SuperDrive supporting dual-layer DVD+R recording.
Expansion slots
Expansion slots	–	PCI Express: occupied x16 graphics slot, two open x4 slots and one open x8 slot. Older PCI and PCI-X expansion cards cannot be reused in these slots.
Display
Screen size
Screen size	20″	None built in
Resolution
Resolution	1680 × 1050	–
Brightness
Brightness	280 nits	–
Display type
Display type	TFT active-matrix LCD with millions of colours; typical contrast 800:1 and viewing angles of 170 degrees horizontal and vertical. Panel technology and refresh rate unpublished.	–
Connections
Ports
Ports	3 × USB-A, Ethernet, headphone jack	4 × USB-A, 2 × Ethernet, headphone jack
Ethernet
Ethernet	1 Gb/s	1 Gb/s
External displays
External displays	–	Up to 2
Front ports
Front ports	–	USB 2.0, FireWire 400 and headphone minijack.
Wi-Fi
Wi-Fi	802.11g	–
Bluetooth
Bluetooth	2.0 + EDR	–
Camera
Camera	iSight camera	–
Back ports
Back ports	Three USB 2.0 ports on the computer, plus two USB 1.1 ports on the keyboard; two FireWire 400 ports sharing 8 W, Mini-VGA output, Gigabit Ethernet, headphone/optical output and audio line-in.	Three USB 2.0, FireWire 800, FireWire 400, two Gigabit Ethernet ports, optical Toslink input/output and analogue audio line-in/out. Four chassis USB 2.0 ports in total, plus two keyboard USB 1.1 ports. AirPort Extreme and Bluetooth 2.0 + EDR are optional, with integrated antennas; built-in support does not mean modules are included.
External displays
External displays	Optional Mini-VGA adapters provide VGA mirroring or S-video/composite output; no DVI connector or extended-desktop mode is listed.	Stock GeForce 6600 LE/6600 and optional 7800 GT have one single-link and one dual-link DVI port, supporting one 30-inch Apple Cinema HD Display alongside a second display. Optional Quadro FX 4500 has two dual-link DVI outputs for two 30-inch displays and a stereo 3D connector. DVI-to-VGA adapter included.
Camera
Camera	Built-in iSight; exact maker resolution is unpublished and omitted.	–
Speakers
Speakers	Built-in stereo speakers and microphone; 12 W digital amplifier.	Built-in speaker and optical/analogue external audio connections.
Keyboard and mouse
Keyboard and mouse	Apple Keyboard, Mighty Mouse and Apple Remote.	Apple Keyboard, Mighty Mouse, USB keyboard extension and DVI-to-VGA adapter.
Design and power
Type
Type	All-in-one	Tower
Weight
Weight	10 kg	–
Width × depth × height
Width × depth × height	493 × 189 × 472 mm	–
Operating system
Operating system	macOS	macOS
Materials
Materials	–	Aluminium enclosure.
Size and weight detail
Size and weight detail	Maker reference weight; actual weight varies with configuration and manufacturing process.	–
Power supply
Power supply	Maximum continuous power 180 W; 100–240 V AC, 50–60 Hz.	–
In the box
In the box	iMac G5, Apple Keyboard, Mighty Mouse, Apple Remote, power cord, install/restore DVDs and documentation; Mac OS X Tiger, iLife ’05, Front Row and Photo Booth. Apple announced availability the week after 12 October 2005; release remains October at month precision.	Mac OS X Tiger and iLife ’05. Apple confirmed the dual-core 2 and 2.3 GHz models available on 19 October 2005, with Quad expected in early November. Macs Only reports its Quad shipped on 10 November and arrived on 11 November; these later Quad dates do not change the generation’s first sale. The exact specification sheet does not publish weight or dimensions.