Power Macintosh G3 Computer Features
Here is a list of the hardware features of the Power Macintosh G3 computers.
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Microprocessor
: PowerPC G3 microprocessor running at a clock frequency of 233 MHz, 266 MHz, 300 MHz, and 333 MHz depending on model and configuration.
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System bus speed
: 66 MHz Apple RISC system bus
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RAM
: 0 MB soldered on the main logic board; expandable to 768 MB using 64-bit (non-parity) 168-pin JEDEC-standard 3.3-volt unbuffered SDRAM (synchronous dynamic access memory) DIMM (dual inline memory module) cards. Three DIMM card slots are provided for DRAM expansion. A minimum of 32 MB of RAM is installed in one of the DIMM card slots. For additional information about supported SDRAM DIMMs, see
RAM DIMMs
.
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ROM
: 4 MB on 160-pin DIMM; 64-bit ROM data bus width.
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Cache
: 512 KB or 1 MB of back-side second-level (L2) cache on processor module (depending on model and configuration). The cache runs at one half the clock frequency of the microprocessor. For example, the cache would run at 166.5 MHz on a 333 MHz processor module.
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Video display modes supported on the desktop, minitower, and All-in-one external monitor port
: 640 by 480, 800 by 600, and 832 by 624 at 32 bits per pixel; 1024 by 768, 1152 by 870, 1280 by 1024, 1600 by 1200, and 1920 by 1080 at 16 bits per pixel; 2 MB synchronous graphics RAM (SGRAM) frame buffer on the main logic board. Video memory can be expanded to 4 MB or 6 MB with an optional 2 MB or 4 MB SGRAM graphics memory module. For the complete list of display modes supported with 2 MB, 4 MB, and 6 MB of video memory installed, see
Table 2
.
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Video display modes supported on the all-in-one built-in monitor
: 640 by 480, 800 by 600, and 832 by 624 at 32 bits per pixel; 1024 by 768 at 16 bits per pixel; 2 MB synchronous graphics RAM (SGRAM) frame buffer on the main logic board. Video memory can be expanded to 4 MB or 6 MB with an optional 2 MB or 4 MB SGRAM graphics memory module. For the complete list of display modes supported with 2 MB, 4 MB, and 6 MB of video memory installed, see
Table 1
.
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Built-in 2D and 3D hardware graphics acceleration
using the ATI 3D RAGE II+DVD or ATI 3D RAGE PRO-PCI graphics controller. Software support through Macintosh QuickDraw 3D and QuickDraw 3D RAVE (rendering acceleration virtual engine) APIs. The ATI 3D RAGE II+DVD graphics controller is the graphics controller used in the original Power Macintosh G3 computer. The enhanced ATI 3D RAGE PRO-PCI graphics controller and 100 MHz graphics bus is incorporated into the logic boards in all Power Macintosh G3 models with the V4.5 F1 and V4.5 F2 ROM subversion number.
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Built-in YUV and MPEG scaler
.
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PERCH slot
: a 182-pin microchannel connector. The PERCH slot is a superset of the PCI specification, and does not accept standard PCI cards. The PERCH slot on the desktop and tower enclosures supports Apple Audio, Audio/Video, and DVD-Video and Audio/Video input/output cards. The All-in-one enclosure does not support the DVD-Video and Audio/Video Card. This note does not provide the electrical specification for the PERCH slot.
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Video input/output
: video input and output feature on Apple Audio/Video and Apple DVD-Video and Audio/Video input/output card configurations allow video input and output through RCA or S-Video connectors.
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Sound
: Apple Audio/Video, Audio, and Apple DVD-Video and Audio/Video input/output card configurations support 16 bits/channel stereo input and output, external jack for sound in, front jacks for headphones on all-in-one enclosures, rear jack for stereophonic speakers, one built-in speaker in tower and desktop enclosures, stereo speakers on all-in-one enclosure.
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Hard disks
: one internal ATA hard disk. A SCSI bus for additional internal SCSI devices and an external SCSI port for additional SCSI devices. PIO, singleword DMA, and multiword DMA data transfers are supported.
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Expansion bay (enclosure dependent)
: no device expansion in all-in-one enclosures, the desktop enclosure has two bays which allow adding internal 3.5-inch SCSI devices. Minitower enclosures support the addition of either 5.25 or 3.5-inch SCSI, ATA, or ATAPI devices. Some models may include an optional Iomega Zip drive. ATA, ATAPI, and SCSI device expansion may require additional cables that are not included in the enclosure.
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Floppy disk
: one internal 1.4 MB GCR/MFM SuperDrive.
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CD-ROM drive
: internal 24X-speed ATAPI CD-ROM drive.
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DVD-ROM drive
: optional DVD-ROM drive providing support for 20X-speed CD-ROM and 2x-speed DVD-ROM media, as well as DVD-Video playback when configured with an Apple DVD-Video and Audio/Video Card. The Apple DVD-Video and Audio/Video Card is not compatible with the All-in-one models.
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Zip drive
: optional 100 MB SCSI or ATAPI Zip drive. The SCSI Zip drive is found in the Power Macintosh G3 All-in-one and the original Power Macintosh G3 computers. The ATAPI Zip drive is found in the Power Macintosh G3 desktop and tower enclosures with V4.5 F1 and V4.5 F2 ROM logic boards.
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Processor bus
: 64-bit wide, 66 MHz, supporting split address and data tenures.
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Standard Macintosh I/O ports
: two serial ports, 10BaseT RJ-45 Ethernet port, a SCSI port, and an ADB port.
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Modem slot
: 112-pin connector on the Apple Audio and Audio/Video I/O cards accepts an optional modem interfac
e
. The interface is a subset of the type of communications slot found in the Power Macintosh 4400, 5500, and 6500 computers. It is strictly a modem interface and does not carry the PCI signals like the comm-slot II does.
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PCI card expansion slots
: the modular and minitower enclosures accept three 12-inch PCI cards; three 15-watt cards or two 25-watt cards. The all-in-one enclosure accepts 6.88-inch PCI cards with the same electrical characteristics.
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Power switch
: soft power controlled from keyboard.
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Voltage switch on desktop and minitower enclosures
: allows selection of either 115 for voltages of 100-130 V or 230 for voltages of 200-230 V depending on the voltage which you will be connecting to. The voltage selection must be set manually for the desktop and minitower enclosures.
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Fan speed control
: The speed of the fan is thermally controlled and is automatically set to the lowest possible speed to minimize noise. The fan speed varies according to the temperature inside the enclosure.
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Energy saving
: sleep, startup, and shutdown scheduling can be controlled with an Energy Saver control panel.
© 1998 Apple Computer, Inc. - Revised 8/13/98