Apple Power Mac G5 (Late 2005) vs Apple Power Macintosh 5500/250

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Power Mac G5 (Late 2005) compared with Power Macintosh 5500/250

	ApplePower Mac G5 (Late 2005)	ApplePower Macintosh 5500/250
Overview
Released
Released	October 2005	1997
Performance
Processor
Processor	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)	PowerPC 603e 250 MHz (Power Macintosh 5500)
CPU cores
CPU cores	2 or 4	1
Graphics
Graphics	NVIDIA GeForce 6600 LE (128 MB) or NVIDIA GeForce 6600 (256 MB)	–
Memory
Memory	512 MB or 16 GB (better)	32 MB
Storage
Storage	160 GB to 250 GB (better)	2 GB to 4 GB
CPU
CPU	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.	250 MHz PowerPC 603e with integrated floating-point unit, 32 KB L1 cache, 256 KB L2 cache and 64-bit 50 MHz system bus. This is a distinct clock configuration from the 5500/225.
GPU
GPU	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.	2 MB built-in SGRAM with hardware 2D and 3D acceleration. Exact support table gives 24-bit colour through 832 × 624, 16-bit through 1152 × 870 and 8-bit at 1280 × 1024. The Australian brochure explicitly specifies the built-in display up to 1024 × 768 with 16-bit colour, but its separate Display support subsection incorrectly repeats a 1 MB/8-bit at 832 × 624 table resembling the earlier 5400; that inconsistent subsection is not used. The exact service table confirms 2 MB SGRAM and accelerated graphics.
Memory type
Memory type	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.	32 MB RAM in the exact Australian brochure and support specification, with no soldered system memory; two 168-pin DIMM sockets permit up to 128 MB. Shared Service Source specifies 60 ns or faster, 5 V buffered EDO DIMMs and supports fast-page modules too; mixing types can operate at fast-page timings.
Storage type
Storage type	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.	April 1997 Australian brochure specifies a graphite 32 MB/4 GB IDE/12× CD-ROM configuration. Exact support database instead lists 2 GB minimum and 24× CD-ROM. Shared Service Source documents later graphite Japanese/Australian 32 MB/4 GB/24× configurations with video input, 33.6 Kbit/s modem and Mac OS 8.0, and a US education 32 MB/24× configuration with video input, NTSC output and Ethernet. The later January 1998 family catalogue lists 2 GB and 12× or 24× drives. All retain a 1.44 MB SuperDrive floppy; optical-drive and bundle conditions are kept explicit.
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.	One PCI slot for a 6.88-inch, 15 W card with a Macintosh driver, Communications Slot II for modem or Ethernet, video-input slot and optional TV/FM tuner bay. Australian brochure includes video input and lists TV tuner with infrared remote and Avid Cinema card/software as optional. The later US education configuration also supplies NTSC output.
Display
Screen
Screen	None built in	12.8″
Resolution
Resolution	–	1024 × 768
Panel
Panel	–	CRT
Display type
Display type	–	Built-in noninterlaced flat-square multiple-scan CRT, 15-inch nominal tube with 325 mm diagonal viewable image (12.8 inches in the January 1998 family catalogue), 0.28 mm dot pitch and software-selectable modes from 640 × 480 to 1024 × 768. Brochure states up to 75 Hz without assigning that maximum to the highest resolution, so headline refresh remains omitted. Base tilts −5° to +15° and swivels 360°.
Connections
Ports
Ports	4 × USB-A, 2 × Ethernet, headphone jack	Headphone jack
Ethernet
Ethernet	1 Gb/s	–
External displays
External displays	Up to 2	–
Front ports
Front ports	USB 2.0, FireWire 400 and headphone minijack.	Headphone output, sound-volume and display controls; infrared receiver for the optional TV/FM remote.
Back ports
Back ports	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.	ADB, external DB-25 SCSI, two RS-232/RS-422/LocalTalk/GeoPort-compatible serial ports, PlainTalk-compatible sound input and stereo output. Australian brochure includes a high-speed GeoPort modem without a published rate; later graphite service configurations specify a 33.6 Kbit/s modem. Exact support and US education service configuration list 10BASE-T, while the January 1998 maker catalogue qualifies Ethernet as configuration-dependent. Modem and Ethernet use the same communications slot; no universal Ethernet headline is assigned. Brochure supports six external SCSI devices.
External displays
External displays	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.	January 1998 family catalogue lists NTSC TV output on some configurations; the service manual confirms NTSC output in the US education 250 MHz bundle. Australian brochure establishes built-in video input but does not establish included TV output. Computer-monitor video mirroring needs the appropriate external connector; do not treat an optional connector as included.
Speakers
Speakers	Built-in speaker and optical/analogue external audio connections.	Built-in stereo speakers, 16-bit stereo sound input/output and SRS 3D surround processing, with rear stereo speaker output.
Microphones
Microphones	–	Built-in microphone; PlainTalk-compatible external sound input.
Keyboard and mouse
Keyboard and mouse	Apple Keyboard, Mighty Mouse, USB keyboard extension and DVI-to-VGA adapter.	April 1997 Australian graphite presentation includes matching keyboard, mouse and necessary cables, built-in video-in card, high-speed modem, Apple System 7.5 software and a regional productivity, reference, education and game bundle. Internet service fees are additional. TV tuner/remote and Avid Cinema are optional. Later US education and international Mac OS 8.0 bundles vary; gallery shows the beige family education configuration, unlike the graphite primary.
Design and power
Type
Type	Tower	All-in-one
Weight
Weight	–	21 kg
Width × depth × height
Width × depth × height	–	383 × 406 × 445 mm
Operating system
Operating system	macOS	macOS
Size and weight detail
Size and weight detail	–	Australian exact brochure gives 44.5 × 38.3 × 40.6 cm (height × width × depth) and 21 kg / 47 lb. Exact support dimensions and January 1998 family catalogue agree. Weight varies with installed internal devices. Shared service physical table swaps width/depth and prints inconsistent pound/kilogram weights; the exact brochure measurements are used.
Power supply
Power supply	–	Exact support and Australian brochure specify 220 W maximum continuous, 110–240 V AC at 50–60 Hz; includes low-power sleep mode. Shared Service Source lists a separate 125 W entry and 220 W maximum for all line/load conditions. No value is treated as measured operating consumption.
Noise
Noise	–	Variable-speed fan automatically runs at the lowest speed needed to minimise noise; the processor also has a small cooling fan. No acoustic measurement is published in these sources.
Materials
Materials	Aluminium enclosure.	–
In the box
In the box	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.	April 1997 Australian maker brochure presents the 250 MHz graphite computer as a ready-to-use product and directs buyers to authorised resellers. Exact support later records introduction on 1 September 1997, while the Australian brochure predates that regional/configuration entry. Retail year 1997 is supported by the contemporary Australian sales brochure; exact first-sale month is unresolved. Exact support lists System 7.5.5 with Enabler 411; later shared service configurations use Mac OS 8.0.