 The beige Power Macintosh G3 minitower |
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| Developer | Apple Computer, Inc. |
|---|---|
| Type | Desktop |
| Release date | November, 1997 |
| Discontinued | January, 1999 |
| Operating system | Mac OS 8, Mac OS 9, Mac OS X (Mac OS X 10.5 with G4 upgrade), |
| CPU | PowerPC G3, 233-333 MHz |
The Power Macintosh G3, commonly called "beige G3s" or "platinum G3s" for the color of their cases, was a series of personal computers designed, manufactured, and sold by Apple Computer, Inc. from November 1997 to January 1999. It was the first Macintosh to use the PowerPC G3 (PPC750) microprocessor, and replaced a number of earlier Power Macintosh models, in particular the 7300, 8600 and 9600 models. It was succeeded by the Power Macintosh G3 (Blue & White), which kept the name but introduced a radically different design. The introduction of the Desktop and Minitower G3 models coincided with Apple starting to sell user-configurable Macs directly from its web site in an online store [2], which was innovative for the time as Dell was the only other major manufacturer then doing this.
The Power Mac G3 introduced a fast and large Level 2 backside cache to Apple's product lineup, running at half processor speed. As a result, these machines were widely considered to be faster than Intel PCs of similar CPU clock speed at launch, an assertion that was backed up by benchmarks performed by Byte Magazine, which prompted Apple to create the "Snail" and "Toasted Bunnies" television commercials.
The Power Macintosh G3 was originally intended to be a midrange series, between the low-end Performa/LC models and the six-PCI slot Power Macintosh 9600. It is the earliest Old World ROM Macintosh model officially able to boot into Mac OS X, and one of only two Old World ROM models able to boot into Mac OS X, the other model being the early PowerBook G3.
Apple developed a prototype G3-based six-slot full tower to be designated the Power Macintosh 9700. Despite demand from high-end users for more PCI slots in a G3 powered computer, Apple decided not to develop the prototype (dubbed "Power Express") into a shipping product, leaving the 9600 as the last six-slot Mac Apple would ever make.
The beige Power Macintosh G3 series came in three versions: an "Outrigger" desktop enclosure inherited directly from the Power Macintosh 7300 (and ultimately derived from the Macintosh IIvx); a minitower similar to (but shorter than) the Power Macintosh 8600 enclosure; and a version with a built in screen, the G3 All-In-One ("AIO"), sometimes nicknamed the "Molar Mac" due to its resemlance to a tooth, that was made available only to educational markets. Equipped with a 233, 266, 300, or 333 MHz PowerPC 750 (G3) CPU from Motorola, these machines used a 66.83 MHz system bus and PC66 SDRAM, and standard ATA hard disk drives instead of the SCSI drives used in most previous Apple systems; however, they retained a legacy Fast SCSI internal bus (up to 10 MB/s) along with the then-standard DB-25 external SCSI bus which had a top speed of 5 MB/s.[3][4] Each bus could support a maximum of 7 devices.
The G3 used Apple's new "Gossamer" logic board, which had originally been developed with an eye towards maximum compatibility with PC components. This was known as the "Yellowknife" project, which had sought to develop the first Apple RISC product[clarification needed] - capable of running any OS that would support it, be it Mac OS or Windows. It was an effort by Apple to gain market share, by allowing their hardware to run industry-standard software, but still remaining Mac OS proprietary. The prototype had a ZIF-socket G3 processor, PCI and ISA slots, Mac and PC serial ports, onboard SCSI, PC and Mac floppy drive connectors, ATX power supplies, and PS/2 keyboard and mouse connections, inserted into an ATX case. The project was scrapped by Steve Jobs, after his return to Apple, and his realization of the devastation of Apple's profits due to the Clone makers. Remnants of this effort can be seen in the form factor of the production G3: the logic board's similarity to the PC ATX motherboard standard; solder points for a PC-type floppy drive; and the ability to use both proprietary Apple power supplies and industry-standard ATX power supplies. As a compact and versatile motherboard, the Gossamer board was originally designed to be able to support both the high-end PowerPC 604e and the new PowerPC G3, but when initial tests found that the cheaper G3 outperformed the 604e in many tests, this functionality was removed and Apple's 604e-based systems died a quiet death.
These machines had no audio circuitry on the logic board; instead, a PERCH slot (a dedicated 182-pin microchannel connector; a superset of the PCI spec, but which does not accept PCI cards) was populated with a "personality card" which provided the audio circuitry. Several "personality cards" were available:
DVD-ROM drives were now an available option, and Zip drives continued to be available as well.
These machines had onboard and external SCSI (from the custom MESH IC), ADB, 10BASE-T Ethernet, two MiniDIN-8 serial ports, and onboard ATI graphics (originally IIc, later updated to Pro and then Rage Pro Turbo) with a slot for VRAM upgrade. Three full-length PCI slots and one internal modem slot, as well as three SDRAM slots (for up to 768 MiB RAM) rounded out the features.
The G3 was the last desktop Macintosh to include built-in external serial ports.
Early G3s with Revision A ROMs do not support slave devices on their IDE controllers, limiting them to one device per bus (normally one optical drive and one hard disk). Additionally, they came with onboard ATI Rage II+ video. G3s with Revision B ROMs support slave devices on their IDE controllers, and had the onboard video upgraded to ATI Rage Pro. G3s with Revision C ROMs also support slave devices on their IDE controllers, but the most significant technical differences are the newer Open Firmware version than the previous two models (2.4 vs 2.0f1) and another onboard video upgrade, this time to ATI Rage Pro Turbo.
The G3 was the last Power Macintosh with a 4 MB ROM. The trend of increasingly large ROMs ended after the introduction of the New World ROM in the iMac, and then the B&W Power Macintosh G3.
| Component | Power Macintosh G3 (Outrigger) | Power Macintosh G3 (Minitower) | Power Macintosh G3 (All-In-One) |
|---|---|---|---|
| Codename | "Gossamer" | "Artemis" | |
| Display | N/A | 15-inch (38 cm) RGB multiple scan CRT display, 1024 × 768 pixel resolution | |
| Processor | 233, 266, or 300 MHz PowerPC G3 (750) | 233, 266, 300, or 333 MHz PowerPC G3 (750) | 233 or 266 MHz PowerPC G3 (750) |
| Cache | 64 KB L1, 512 KB or 1 MB backside (1:2) L2 | 64 KB L1, 512 KB (1:2) L2 | |
| Graphics | ATI 3D Rage II+, ATI 3D Rage Pro, or ATI 3D Rage Pro Turbo with 2 MB of 83 MHz SGRAM Expandable to 6 MB SGRAM memory |
ATI 3D Rage II+ or ATI 3D Rage Pro with 2 MB of 100 MHz SGRAM Expandable to 6 MB SGRAM memory |
|
| Front side bus | 66.83 MHz (Configurable to 70 MHz, 75 MHz or 83.3 MHz) | ||
| Memory | 32 or 64 MB Low Profile PC66 SDRAM Expandable to 768 MB |
64 or 128 MB PC66 SDRAM Expandable to 768 MB |
32 MB Low Profile PC66 SDRAM Expandable to 768 MB |
| Hard drive (Up to 128 GB supported) |
4 or 6 GB | 4, 6, 8, or 9 GB | 4 or 6 GB |
| Expansion slots | 3 - PCI, 1 - PERCH: Either "Whisper", "Wings A/V", or "Bordeaux". | 3 - PCI, 1 - PERCH: Either "Whisper" or "Wings A/V". | |
| Expansion bays | 2 - for 3.5-inch SCSI devices | Addition of 5.25 or 3.5-inch SCSI or ATA devices supported | N/A |
| Media | 24x CD-ROM, DVD-ROM, 1.44 MB floppy, optional Zip | 24x CD-ROM, 1.44 MB floppy, optional Zip | |
| Standard features | 1 ADB port, 2 × mini-DIN-8 RS-422 serial port (printer/modem Geoport, AppleTalk), 1 DB-25 SCSI port, built-in mono speaker, 16-bit audio input with optional RCA jacks, 16-bit audio output with optional RCA jacks, 10BASE-T Ethernet, optional 56k modem, DB-15 Video display port. | 1 ADB port, 2 × mini-DIN-8 RS-422 serial port (printer/modem Geoport, AppleTalk), 1 DB-25 SCSI port, built-in stereo speakers, built-in microphone, 1 - 16‑bit audio input, 3 - 16-bit audio output, 10BASE-T Ethernet, optional 56k modem, external DB-15 Video display port. | |
| Minimum operating system | Mac OS 8.0 | Mac OS 8.1 | |
| Maximum operating system | Mac OS X 10.2.8 "Jaguar" and Mac OS 9.2.2 ^* ^* Unofficially possible to install up to Mac OS X 10.4.11 "Tiger" on these systems with help of third-party software, or Mac OS X 10.5.8 "Leopard" if a G4 processor upgrade is also installed. See "Upgradability" below. |
||
| Weight | 22.0 lb (10 kg) | 33.1 lb (15 kg) | 59.5 lb (26.8 kg) |
The 233 and 266 MHz desktop models shipped with 4 GB hard drives, and the 300 MHz with a 6 GB drive, all at 5400 RPM. This would be the last traditional desktop model offered by Apple, replaced entirely by minitowers and all-in-one configurations, until the introduction of the significantly smaller Mac mini.
The 233 MHz minitower shipped with a 4 GB drive, the 266 MHz with a 6 GB drive, and the 300 MHz minitower shipped with two 4 GB drives in a RAID configuration; all models were 5400 RPM. The 300 MHz minitower was replaced by the 333 MHz and finally the 366 MHz towers, each of which shipped with a 9.1 GB 7200 RPM SCSI drive, attached to a SCSI/PCI card-this model also included 100BASE-TX Ethernet (as opposed to the other models' 10BASE-T), though this was in the form of a PCI card, which occupied another PCI slot. The Macintosh Server G3/300Mhz also shipped with a PCI Ultra Wide SCSI card and the 100Base-T Ethernet PCI card. The 333 and the (canceled) 366 MHz model had only 6 MiB VRAM; the 300 MHz model shipped with a 128-bit iXMicro PCI video card with 8 MiB VRAM.
The AIO shipped in two basic configurations: a 233 MHz version with a floppy drive and a 4 GB hard drive and a 266 MHz version with a built-in Zip drive, floppy drive, and either a "Whisper" personality card or an All-In-One version of the "Wings" personality card. Half of the AIO's case was translucent, suggesting what was to come with the iMac.
The Gossamer logic board has three full-length (12 ") PCI slots, making it capable of taking any PCI cards that have Macintosh drivers available for them (for example, some RealTek-based network adapters, a lot of USB, ATA/IDE [or SATA] and FireWire cards). The most common PCI card upgrades normally added to Beige G3 Power Macs are FireWire cards, USB cards and FireWire/USB combo cards (especially after the release of the first generation iMac, which caused many vendors to start releasing USB peripherals for the Macintosh), 100BASE-TX or 1000BASE-T (gigabit Ethernet) network adapter (for those who need faster than the onboard 10BASE-T), video cards (ATI Radeon 7000 and 9200 cards are a popular choice), ATA/EIDE, Serial ATA and Ultra SCSI cards. Television tuner and radio cards are also often chosen to supplement the AV features on a Wings personality card, or to provide A/V input for models with the Whisper personality card.
Some users have upgraded the Whisper personality card in their Beige G3s with a "Wings" Personality card (which is plugged into the same PERCH slot), and some have upgraded the ROM on their Beige G3s to a newer version (Revision A boards to Revision B or Revision C boards).
For storage, the G3 is capable of taking any ATAPI/IDE hard disks, provided that the drive's size is within the 28-bit LBA limit. This means a G3 is capable of supporting ATA hard disks of up to 137 GB (2 blocks of 512 bytes each). This limitation can be overcome by using an IDE or SATA PCI-compatible card (e.g. Acard or Sonnet) to allow the G3 to use a maximum of 2 drives over the 137 GB limit.
The ATAPI/IDE CD-ROM drive can also be replaced with a CD-RW, DVD-ROM or DVD-RW drive, although care must be taken while purchasing the upgrade as the Mac is incompatible with some drives and may refuse to boot at all if an incompatible drive is installed. Also, many third-party optical drives cannot be used as boot devices with the G3, though they work correctly for normal use, and burning on many third party CD-RW and DVD-RW drives requires either commercial drivers or is unsupported even though reading and booting from the drive may still work. It is also capable of taking SCSI storage devices, and with the presence of the right PCI cards, SATA, USB and FireWire storage devices.
The presence of an onboard SCSI controller (the SCSI controller is codenamed MESH - Macintosh Enhanced SCSI Hardware) and connectors permits the use of Mac-enabled SCSI scanners and storage devices, though this runs at only 5 MB/s.
The G3 can support up to 768 MiB of SDRAM in any configuration (although incompatibility has been reported with some DIMM modules in certain configurations- for example, newer single-sided PC‑133 RAM modules will not be detected correctly if they will be detected at all and if the machine can boot with them in place, and the desktop and all-in-one units required the use of low-profile RAM due to space constraints). It should be able to take 168-pin SDRAM of any speed, though it will run at PC66 speeds. The onboard video RAM can be upgraded from 2 MiB to 6 MiB with a 4 MiB SGRAM module (which runs at 83 MHz on Rev. A machines, and 100 MHz on Rev. B and C machines).
The G3 processor module (a PowerPC 750 plus L2 cache) can be easily changed to the faster model, i.e. 333 MHz and even 366 MHz or 375 MHz with an 83.3 MHz bus (uncommon). Consult a Clocking the Power Mac G3 article for more info.
The CPU can be upgraded as high as a 1.0 GHz G4 or 1.1 GHz G3 using ZIF upgrades from third party vendors, although the user would not see much practical difference in performance on chips faster than 733 MHz due to the system bus limitations, which runs at 66.83 MHz unless overclocked. However, G4 chips running over 533 MHz do not allow the system bus to run faster than 66 MHz, so you cannot overclock the bus if you wish to use one of these G4s. (G3s do allow it.)
The All-In-One can be modified to use a PCI video card with the internal monitor.
The G3 officially supports up to Mac OS X 10.2.8, although some devices will not work under Mac OS X, such as the floppy drive, the video features of the "Wings" personality card, and the 3D graphics acceleration functions of the onboard ATI Rage series video. Support for newer versions is possible with the use of third party software solutions such as XPostFacto, albeit with a few tradeoffs and catches-the biggest being the lack of support by Apple and the fact that a supported PCI video card must be present as support for the onboard ATI Rage series video was dropped completely as of Mac OS X 10.3 (although the most recent versions of XPostFacto also ships with kernel modules that supports the onboard ATI Rage series video, the module is known to still have a few minor bugs). Mac OS X 10.5 Leopard can be run only if a G4 processor upgrade is installed.
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| group2 = Peripherals
| list2 =
| group1 = Displays | list1 =
| group2 = External drives
| list2 =| group3 = Input devices | list3 =
| group4 = Networking | list4 =
| group5 = Printers | list5 =
| group7 = Newton | list7 =
| group8 = Other | list8 =
}}
| below = Apple hardware since 1998 }}
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