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Apple Power Macintosh G3 300 Minitower Specs

Identifiers: Power Mac G3 MT - M6572LL/A* - N/A* - M4405 - None

All Power Macintosh G3 Models | All 1998 Models | Dynamically Compare This Mac to Others

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Apple Power Mac G3The Apple Power Macintosh G3/300 Minitower, based on the compact Gossamer architecture, features a 300 MHz PowerPC 750 (G3) processor with 1 MB of backside cache, 64 MB or 128 MB of RAM, a 4.0 GB or 8.0 GB hard drive, a 24X CD-ROM drive, ATI 3D Rage II+ or Rage Pro (starting May 1, 1998), or Rage Pro Turbo (after August 12, 1998) graphics acceleration with 6 MB of VRAM (some configurations offer additional VRAM on a PCI card), and either the "Whisper personality card" with audio input/output or the "Wings personality card" with audio/video input/output -- all packed into an easily expandable minitower case.

The Power Macintosh G3 models were the first Apple Macs to use the "third-generation" (G3) PowerPC 750 processor which also unveiled a new "backside" level 2 cache for a substantial performance boost compared to earlier systems using a "lookaside" level 2 cache.

There were at least three different "standard" configurations of the Power Macintosh G3/300 Minitower -- the original version (M6572LL/A) equipped with 64 MB of RAM, a single 4 GB Ultra/Wide SCSI hard drive, and 6 MB of VRAM for US$3399. A second original configuration (M6494LL/A) was configured with 128 MB of RAM, dual 4 GB Ultra/Wide SCSI hard drives, 6 MB of VRAM installed onboard and an additional 8 MB of VRAM on a 2D/3D graphics PCI card, dual display support, and both 10Base-T and 10/100Base-T Ethernet for US$4599.

The second model (M7247LL/A) -- introduced August 12, 1998 -- shipped with a single 8 GB IDE/ATA-2 hard drive, a Zip drive, Rage Pro Turbo graphics with 6 MB of VRAM and the "Wings personality card" with audio and video input/output for US$2399. Custom configurations also were available.

To purchase or upgrade a G3 Mac -- as well as newer Macs -- see site sponsor OHS.


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Click on the category for related details. The most commonly needed info is "open" by default, but all info is important.


March 17, 1998* December 14, 1998*
Details: The "Introduction Date" refers to the date a model was introduced via press release. The "Discontinued Date" refers to the date a model either was replaced by a subsequent system or production otherwise ended.

The first models (M6572LL/A and M6494LL/A ) were discontinued July 7, 1998. The second model (M7247LL/A) was introduced August 12, 1998.

Also see: All Macs introduced in 1998.
1 N/A
Details: N/A These numbers reflect an average of user provided 32-bit and 64-bit results as submitted to the Geekbench website. Higher numbers are better.

You also might be interested in reviewing all 32-bit Geekbench 2 user submissions for Macs with the N/A* Model Identifier, which may include multiple models.

To dynamically compare Geekbench results from different Macs side-by-side, see EveryMac.com's Ultimate Mac Comparison.
300 MHz PowerPC 750 (G3)
Details: N/A
ZIF Socket Integrated
Details: The Power Macintosh G3 models have the processor mounted on a ZIF socket.
66 MHz 150 MHz
Details: This system has a 150 MHz backside bus and 1 MB of level 2 cache.
Macintosh ROM 4 MB
Details: N/A
64k 1 MB (backside)
Details: The 1 MB of backside cache has a 150 MHz bus.
PC66 SDRAM 10 ns
Details: Supports 10 ns PC66 168-pin SDRAM.
64 MB, 128 MB 768 MB
Details: Site sponsor Other World Computing sells memory -- as well as other upgrades -- for this Power Macintosh G3.

Also see: Actual Max RAM of All G3 & Later Macs.
None 3
Details: There is no performance advantage to installing memory modules in pairs.
3D Rage II+* EDO SGRAM
Details: *ATI 3D Rage II+ graphics onboard originally, upgraded to ATI Rage Pro starting May 1, 1998, and upgraded to ATI Rage Pro Turbo starting August 12, 1998.
6 MB* 6 MB*
Details: *This model has 2 MB of VRAM onboard and a single expansion slot that supports an additional 4 MB of VRAM (3.3V 83 MHz 144-pin SO-DIMM). M6572LL/A and M7247LL/A shipped with 6 MB of VRAM. The M6494LL/A configuration shipped with 6 MB of VRAM installed and an additional 8 MB of VRAM on a 2D/3D graphics PCI card.
Single Display* 1024x768*
Details: Apple advertised that this system can support "thousands of colors at up to 1024 by 768-pixel resolution (24-bit), [and] millions of colors at up to 832 by 624-pixel resolution (32-bit), refresh rate of up to 85 Hz." It can support resolutions up to 1600x1200 with the maximum 6 MB of VRAM installed.

*The M6494LL/A configuration supports dual displays.
None* N/A
Details: *The M6494LL/A configuration supports dual displays with a pre-installed PCI card.
4.0, 4.0 x2, 8.0 GB N/A
Details: M6572LL/A shipped with a single 4.0 GB Ultra/Wide SCSI hard drive and corresponding PCI card, M6494LL/A shipped with dual 4.0 GB Ultra/Wide SCSI hard drives and a corresponding PCI card, and M7247LL/A shipped with a single 8.0 GB IDE hard drive.

*This system has internal buses for IDE/ATA-2 and SCSI (up to 5 MB/second) -- drives larger than 128 GB are not supported.

In the US (and many other countries), site sponsor Other World Computing sells storage upgrades for this Power Mac G3.
3.5" (25.4 mm) IDE/ATA-2 & SCSI*
Details: *Shipped standard with either a 3.5" IDE/ATA-2 hard drive or a Ultra/Wide SCSI PCI card and dual hard drives. It also has an internal SCSI bus (up to 5 MB/second). It is designed to hold one internal 3.5" hard drive and it has three front-facing 5.25" drive bays that also can be used by a hard drive or removable storage drives. Capacity of each hard drive drive must be smaller than 128 GB.
24X CD-ROM 1.44 MB (Manual)
Details: 24X tray-loading CD-ROM drive standard. An optional DVD-ROM drive was available by custom configuration (did not support MPEG-2 video playback without a third-party solution). An internal Zip 100 drive also was available as a build-to-order option for M6572LL/A and M6494LL/A, and standard on M7247LL/A.
56k (optional) 10Base-T*
Details: *10/100Base-T Ethernet also was standard on the M6494LL/A configuration. It was available via build-to-order on the other configurations.
None None
Details: N/A
None None*
Details: *Firewire "400" available via build-to-order.
3 PCI, Personality* 1 3.5", 3 5.25"
Details: *In the original default configuration (M6572LL/A), this model has two open 33 MHz PCI slots and the "personality card" slot that is occupied by a "Whisper personality card" providing audio input/output. In the second default configuration (M6494LL/A) one 33 MHz PCI slot is open and the "personality card" slot also is occupied by a "Whisper personality card". The second model (M7247LL/A) -- introduced August 12, 1998 -- shipped with three open 33 MHz PCI slots and the "personality card" slot occupied by a "Wings personality card" which provides audio and video input/output.

It has one "internal" 3.5" bay (for a hard drive) and three external 5.25" bays (which can be used by hard drives and removable media drives). By default, one external 5.25" bay is free on the M7247LL/A configuration (a Zip 100 drive was pre-installed) and two external 5.25" bays are free on the two original models.
AppleDesign Keyboard Apple ADB Mouse II
Details: N/A
Tower Power Mac G3 MT (Beige)
Details: N/A
M6572LL/A* Power Mac G3 MT
Details: *M6572LL/A refers to the original configuration equipped with 64 MB of RAM, a single 4 GB Ultra/Wide SCSI hard drive, and 6 MB of VRAM. M6494LL/A was assigned to the original configuration with 128 MB of RAM, dual 4 GB Ultra/Wide SCSI hard drives, 6 MB of VRAM installed onboard and an additional 8 MB of VRAM on a 2D/3D graphics PCI card, dual display support, and both 10Base-T and 10/100Base-T Ethernet.

The second model -- introduced August 12, 1998 -- was assigned M7247LL/A and shipped with a single 8 GB IDE/ATA-2 hard drive, a Zip drive, 6 MB of VRAM (Rage Pro Turbo) and the "Wings personality card" with audio and video input/output.
M4405 (EMC None) N/A*
Details: *This model does not have a Model Identifier. Its Gestalt ID is 510.

Please note that these identifiers refer to more than one model.

Also see: All Macs with the M4405 Model Number, the None EMC Number, and the N/A* Model Identifier.

For more about these identifiers and how to locate them on each Mac, please refer to EveryMac.com's Mac Identification section.
3.6V Lithium N/A
Details: N/A
8.0 X 10.2.8
Details: This system cannot run versions of MacOS X more recent than 10.2.8.
Boot/Classic Mode Emulation Only
Details: All Power Macintosh G3 models are capable of booting Mac OS 9 and using Mac OS 9 applications within the Mac OS X "Classic" environment.

Site sponsor OHS specializes in heavily upgraded Macs capable of running both Mac OS X and Mac OS 9 applications.
15.2 x 9.6 x 17.8 33.1 lbs. (15 kg)
Details: In inches - height by width by depth, (38.6 cm, 24.4 cm, 45.2 cm).
US$2399-US$4599* N/A
Details: *The original entry-level configuration (M6572LL/A) sold for US$3399, and the high-end dual drive configuration (M6494LL/A) sold for US$4599. The second model (M7247LL/A) sold for US$2399.

Please note that on average the estimated current retail pricing of used systems is updated twice a year (please refer to the date on the bottom of the page for the date last updated).

Photo Credit: Apple Computer.


Click on a category for additional details. The most commonly needed info is "open" by default, but all info is important. The icons correspond with the icons for each port on the computer.


1 (DB-15) None
Details: N/A
1 1 (DB-25)
Details: Single ADB port and single SCSI port.
2* 2*
Details: *Two Geoport compatible serial ports standard (one printer, one modem).
None None*
Details: *Firewire "400" available via build-to-order.
1* (RJ-11) 1* (RJ-45)
Details: *Internal 56k modem optional, 10Base-T Ethernet standard, 10/100Base-T available via build-to-order.
None* None*
Details: One configuration of the Power Macintosh G3/266 Minitower (M6142LL/A) as well as one configuration of the Power Macintosh G3/300 Minitower (M7247LL/A) have S-video and composite input/output ports.
None 1
Details: Includes a single analog 16-bit stereo sound in jack.
1 None
Details: Includes a single analog 16-bit stereo sound out jack.
1 N/A
Details: N/A
1 N/A
Details: 100-240V AC. 240W maximum.

Ten of the most popular Q&As about the Power Macintosh G3 models follow.



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