Power Mac G4 (AGP Graphics)
.png) | |
| Apple's front and rear views of the AGP Graphics and Gigabit Ethernet models (Service Source p. 13) | |
| Specifications | |
|---|---|
| Manufacturer | Apple Computer, Inc. |
| Type | Tower personal computer |
| Released | 15 September 1999 (Apple); announced 31 August 1999 (Low End Mac) |
| CPU | PowerPC G4 at 350, 400, 450 or 500 MHz; 100 MHz bus |
| Memory | Four PC100 SDRAM DIMM slots; 64 MB to 1.5 GB (Apple) |
| Storage | 10, 20 or 27 GB Ultra ATA/66 hard drive |
| Display | — |
| Sound | — |
| Graphics | ATI Rage 128 or Rage 128 Pro, 16 MB, in an AGP 2X slot; VGA, with DVI on later cards |
| Media | DVD-ROM or DVD-RAM; optional Zip drive |
| Ports / interface | Two USB, three FireWire (one internal), 10/100 Ethernet, sound in and out |
| Expansion | Three 64-bit PCI slots; AGP 2X slot; AirPort card slot; modem slot |
| Power | 115 or 230 V AC by switch, 47–63 Hz; 200 W maximum (Apple) |
| Dimensions | 17 × 8.9 × 18.4 in (43.2 × 22.6 × 46.7 cm) |
| Weight | 30 lb |
| OS / Firmware | Mac OS 8.6; supported to Mac OS X 10.4 (Low End Mac) |
The Power Mac G4 (AGP Graphics) is the second Power Mac G4 tower, with its graphics card in an AGP 2X slot. Apple's specification page dates it 15 September 1999 and lists 350, 400, 450 and 500 MHz processors with 1 MB of backside L2 cache, a 100 MHz bus, three PCI slots and four PC100 DIMM slots.[1] Low End Mac calls it the "Sawtooth" model after its logic board, dates the announcement 31 August 1999, and records that Apple postponed the 500 MHz model until February 2000 because Motorola could not make enough 500 MHz chips, cutting each configuration's speed by 50 MHz without cutting the price.[2]
The PCI Graphics model that preceded it is described on Power Mac G4#PCI Graphics.
Specifications
[edit | edit source]| Item | Figure |
|---|---|
| Processor | PowerPC G4 at 350, 400, 450 or 500 MHz on a removable processor module; 64K L1 and 1 MB backside L2 cache |
| Bus | 100 MHz system bus, 128-bit data path |
| Memory | Four DIMM slots for PC100 SDRAM (3.3 V, unbuffered, 168-pin); 64, 128, 256 or 512 MB DIMMs, 256 MB modules of 128 or 256 Mbit technology and 512 MB of 256 Mbit |
| Graphics | 16 MB ATI Rage 128 or Rage 128 Pro card in the AGP 2X slot (slot 1) |
| Expansion | Three PCI slots; AirPort card slot; internal modem slot |
| Ports | Two USB, two external FireWire ports plus an internal FireWire connector at J9, 10/100 Ethernet, sound in and out |
| Storage | Ultra ATA/66 drive in bay 3 (two ATA drives maximum, both in bay 3); up to three SCSI drives with a SCSI card; DVD-ROM or DVD-RAM; optional Zip drive. Low End Mac gives 10, 20 or 27 GB drives in the 400, 450 and 500 MHz configurations |
| Power | 115 or 230 V AC by switch; 200 W maximum continuous (not including display) |
| Clock battery | 3.6 V lithium (922-4028) |
Sources: Apple's specification page and service manual.[1][3] Low End Mac gives the RAM ceiling as 2 GB, of which Mac OS 9 recognises 1.5 GB, and says the Rage 128 card was replaced by the Rage 128 Pro, with a DVI port, in December 1999.[2]
Identifying an AGP Graphics machine
[edit | edit source]The graphite AGP Graphics and Gigabit Ethernet models look the same from outside, with the sound ports running vertically on the rear I/O panel. The difference is on the logic board: AGP Graphics boards have an internal FireWire connector at J9 and Gigabit Ethernet boards do not (pp. 4–5).[3] The PCI Graphics model has its sound ports in a horizontal row; the Digital Audio model has them in the upper half of the panel and four PCI slots.
Power and reset
[edit | edit source]The logic board needs a +5 V standby "trickle" from the supply to start. With the mains lead in and the machine off, measure from pin 16 (black lead) to pin 9 (red lead) of the 20-pin supply connector, leaving the connector plugged into the board: about +5 V means the supply's standby side is working (pp. 220–222).[3] The board's single red LED shows that standby power is present; do not fit or remove DIMMs or cards while it is lit (p. 211). A machine that will not start gets a PMU reset first: check the battery reads 3.3 to 3.7 V, press S1 once only, and wait ten seconds before reconnecting power (pp. 208–211).[3] Both procedures are given in full on Power Mac G4 Troubleshooting.
Low End Mac warns that AGP 4X cards with a retention tab may not fit, and that some may be electrically incompatible with the 2X slot.[2]
Service parts
[edit | edit source]| Part | Apple part number |
|---|---|
| Logic board | 661-2251 (V.1), 661-2302 (V.2) |
| Processor module | 661-2278 (350 MHz); 661-2259 and 661-2308 Rev. 2 (400 MHz); 661-2260 and 661-2306 Rev. 2 (450 MHz); 661-2262 (500 MHz) |
| Power supply | 661-2256, 661-2303 |
| Video card | 661-2273 (Rage 128), 661-2292 (Rage 128 Pro) |
| Battery | 922-4028 |
| Fan | 922-3295 |
| CPU heatsink kit | 076-0803 |
| Front panel board | 922-4049 |
Source: exploded view.[3]
Maintenance and repair
[edit | edit source]Documentation
[edit | edit source]Related pages
[edit | edit source]References
[edit | edit source]- ↑ 1.0 1.1 Apple, "Power Mac G4 (AGP Graphics) - Technical Specifications". G4 at 350, 400, 450 or 500 MHz; 2 USB; 200 max watts; 128-bit, 100 MHz data path; 115–230 V, 47–63 Hz; L1 64K; L2 1 MB; video 15-pin VGA or DVI; SCSI by PCI card; battery type 3.6V Lithium; Ethernet 10/100Base-T; slots (3) PCI and (1) 2x AGP dedicated to video; FireWire 3; AirPort ready; four PC100 DIMM slots, 64 MB–1.5 GB; introduced 9/15/1999; 10 GB minimum hard drive; ATA-66 or SCSI; 30 lb; 17 H × 8.9 W × 18.4 D in; 32x CD; Mac OS 8.6 and 9.
- ↑ 2.0 2.1 2.2 Low End Mac, "Sawtooth Power Mac G4" (LEM Staff). Announced 31 August 1999; 500 MHz postponed on 13 October 1999 until 16 February 2000; 350 MHz Sawtooth from 1 December 1999 replacing the Yikes! model; Rage 128 Pro video with DVI after 2 December 1999; no ADC support; possible incompatibility with AGP 4X cards; up to 2 GB RAM, 1.5 GB seen by Mac OS 9; firmware update 4.2.8; Mac OS 8.6 to 10.4; PRAM battery 3.6 V half-AA; model numbers M6921, M7232, M7824, M7825, M7827.
- ↑ 3.0 3.1 3.2 3.3 3.4 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, Standard Configurations pp. 6–11, Views p. 13, Logic Boards p. 15, Hard Drive pp. 81–82, Logic Board Troubleshooting pp. 208–211, Power Supply Verification pp. 220–222, SDRAM DIMMs pp. 230–231, Exploded View p. 276.