Power Mac G4 (Gigabit Ethernet)

Power Mac G4 (Gigabit Ethernet)
	Apple's exploded view of the Gigabit Ethernet model with service part numbers (Service Source p. 279)
Specifications
Manufacturer	Apple Computer, Inc.
Type	Tower personal computer
Released	19 July 2000 (Low End Mac)
Discontinued	January 2001 (replaced by the Digital Audio model, Low End Mac)
CPU	PowerPC G4 at 400 MHz, or two at 450 or 500 MHz; 100 MHz bus
Memory	64, 128 or 256 MB PC100 SDRAM; four DIMM slots; 1.5 GB maximum
Storage	20, 30 or 40 GB Ultra ATA/66 hard drive
Display	—
Sound	—
Graphics	ATI Rage 128 Pro, 16 MB, in an AGP 2X slot; ADC and VGA ports
Media	DVD-ROM or DVD-RAM; optional Zip drive
Ports / interface	Two USB, two FireWire, 10/100/1000BASE-T Ethernet, sound in and out, internal 56K modem
Expansion	Three 64-bit, 33 MHz PCI slots; AGP 2X slot; AirPort card slot
Power	115 or 230 V AC by switch; 220 W maximum continuous (Apple)
Dimensions	17.0 × 8.9 × 18.4 in (43.2 × 22.6 × 46.7 cm)
Weight	30 lb (13.6 kg)
OS / Firmware	Mac OS 9.0.4; supported to Mac OS X 10.4 (Low End Mac)

The Power Mac G4 (Gigabit Ethernet) is the Power Mac G4 tower that brought dual processors and gigabit Ethernet to the range. Apple's specification page lists three standard configurations: a 400 MHz single-processor machine and dual-processor machines at 450 and 500 MHz, each processor with 1 MB of backside L2 cache, on a 100 MHz bus.^[1] Low End Mac, which calls it the "Mystic" model, dates it 19 July 2000 and notes that Apple added the second processor without raising the price; the Digital Audio model replaced it in January 2001.^[2] Its graphics card has an Apple Display Connector (ADC) port beside the VGA port; Low End Mac says the AGP Graphics model before it could not drive ADC displays.^[1]^[3]

Specifications

**Power Mac G4 (Gigabit Ethernet), Apple standard configurations**
Order number	Processor	Memory	Hard drive	Optical drive
M7891LL/A	400 MHz G4	64 MB	20 GB, 5400 rpm	DVD-ROM
M7892LL/A	Dual 450 MHz G4	128 MB	30 GB, 7200 rpm	DVD-ROM
M7893LL/A	Dual 500 MHz G4	256 MB	40 GB, 7200 rpm	DVD-RAM

Source: Apple.^[1] All three have a 16 MB ATI Rage 128 Pro card in the AGP 2X slot with ADC and VGA ports, three PCI slots, two FireWire and two USB ports, 10/100/1000BASE-T Ethernet and a 56K modem.

Identifying a Gigabit Ethernet machine

From outside, the Gigabit Ethernet model looks like the AGP Graphics model: graphite case, sound ports running vertically on the I/O panel, three PCI slots. On the logic board, the AGP Graphics board has an internal FireWire connector at J9 and the Gigabit Ethernet board does not (pp. 4–5).^[4] The Gigabit Ethernet card, ADC port and dual-processor module are the other giveaways.

Power supply

The Gigabit Ethernet model has a different supply from the AGP Graphics model: Apple lists 661-2332 for it, against 661-2256 and 661-2303 for the AGP Graphics machine. It connects to the logic board by a 22-pin connector, and the standby "trickle" voltage the board needs to start is +28 V, measured from pin 11 (black lead) to pin 22 (red lead) with the mains lead in and the machine off (pp. 220–226, 276, 279).^[4] The same connector carries +3.3 V (pins 1, 2, 8, 12), +5 V (pins 4, 6, 20, 21), +12 V (pin 10) and −12 V (pin 13). The full verification, which Apple uses for a machine with "no apparent power", is on Power Mac G4 Troubleshooting.

Set the supply's voltage switch to the local mains before connecting a replacement (p. 149).^[4]

Service parts

**Power Mac G4 (Gigabit Ethernet) parts (Apple exploded view, p. 279)**
Part	Apple part number
Logic board	661-2331
Processor module	661-2354 (400 MHz, Ver. 2), 661-2305 (dual 450 MHz), 661-2325 (dual 500 MHz)
CPU heatsink kit	076-0803 (single), 076-0812 (dual)
Power supply	661-2332
Video card (AGP, 16 MB, Rage 128 Pro, Ver. 2)	661-2330
Modem card	661-2324
Battery	922-4028
Fan	922-3295
Front panel board (Ver. 2)	922-4234

Source: exploded view.^[4]

Maintenance and repair

Documentation

Power Mac G4/Macintosh Server G4 Service Source

Related pages

References

↑ ^1.0 ^1.1 ^1.2 Apple, "Power Mac G4 (Gigabit Ethernet) - Technical Specifications". Order numbers M7891LL/A (400 MHz), M7892LL/A (dual 450 MHz), M7893LL/A (dual 500 MHz); 1 MB backside L2 per processor; 64, 128 or 256 MB PC100 SDRAM; 20 GB (5400 rpm), 30 GB or 40 GB (7200 rpm) drives; 16 MB ATI RAGE 128 Pro in AGP 2X; DVD-ROM or DVD-RAM; two FireWire, two USB; 10/100/1000BASE-T; 56K modem; four DIMM slots to 1.5 GB (999 MB per application in Mac OS 9); three ATA bays (two ATA drives or three SCSI); three 64-bit, 33 MHz PCI slots; ADC and VGA; 16-bit sound in and out; line voltage 115 V AC (90–132 V) or 230 V AC (180–264 V), 47–63 Hz; 220 W maximum continuous; 10–35 °C; 17.0 × 8.9 × 18.4 in; 30 lb (13.6 kg).
↑ Low End Mac, "Mystic Power Mac G4" (LEM Staff). Introduced 19 July 2000; code names Mystic and Gigabit Ethernet; replaced by Digital Audio on 18 January 2001; up to 2 GB RAM, 1.5 GB seen by Mac OS 9; AGP 4X cards may be electrically incompatible with the 2X slot; ADC and VGA, no DVI; firmware update 4.2.8; Mac OS 9.0.4 to 10.4; PRAM battery 3.6 V half-AA.
↑ Low End Mac, "Sawtooth Power Mac G4": the AGP Graphics model "is unable to support ADC displays".
↑ ^4.0 ^4.1 ^4.2 ^4.3 Apple Computer, Service Source: Power Mac G4/Macintosh Server G4 (2002), File:Power Mac G4 and Macintosh Server G4 Service Source (2002).pdf; see Power Mac G4/Macintosh Server G4 Service Source. Page numbers are PDF pages: Identifying Versions pp. 4–5, Views p. 13, Logic Boards p. 15, Block Diagrams p. 200, Power Supply Verification pp. 220–229, SDRAM DIMMs pp. 230–231, Exploded View p. 279.

[age-1] 1.0 ^1.1 ^1.2 Apple, "Power Mac G4 (Gigabit Ethernet) - Technical Specifications". Order numbers M7891LL/A (400 MHz), M7892LL/A (dual 450 MHz), M7893LL/A (dual 500 MHz); 1 MB backside L2 per processor; 64, 128 or 256 MB PC100 SDRAM; 20 GB (5400 rpm), 30 GB or 40 GB (7200 rpm) drives; 16 MB ATI RAGE 128 Pro in AGP 2X; DVD-ROM or DVD-RAM; two FireWire, two USB; 10/100/1000BASE-T; 56K modem; four DIMM slots to 1.5 GB (999 MB per application in Mac OS 9); three ATA bays (two ATA drives or three SCSI); three 64-bit, 33 MHz PCI slots; ADC and VGA; 16-bit sound in and out; line voltage 115 V AC (90–132 V) or 230 V AC (180–264 V), 47–63 Hz; 220 W maximum continuous; 10–35 °C; 17.0 × 8.9 × 18.4 in; 30 lb (13.6 kg).

[lem-2] Low End Mac, "Mystic Power Mac G4" (LEM Staff). Introduced 19 July 2000; code names Mystic and Gigabit Ethernet; replaced by Digital Audio on 18 January 2001; up to 2 GB RAM, 1.5 GB seen by Mac OS 9; AGP 4X cards may be electrically incompatible with the 2X slot; ADC and VGA, no DVI; firmware update 4.2.8; Mac OS 9.0.4 to 10.4; PRAM battery 3.6 V half-AA.

[lemagp-3] Low End Mac, "Sawtooth Power Mac G4": the AGP Graphics model "is unable to support ADC displays".

[ss-4] 4.0 ^4.1 ^4.2 ^4.3 Apple Computer, Service Source: Power Mac G4/Macintosh Server G4 (2002), File:Power Mac G4 and Macintosh Server G4 Service Source (2002).pdf; see Power Mac G4/Macintosh Server G4 Service Source. Page numbers are PDF pages: Identifying Versions pp. 4–5, Views p. 13, Logic Boards p. 15, Block Diagrams p. 200, Power Supply Verification pp. 220–229, SDRAM DIMMs pp. 230–231, Exploded View p. 279.

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