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Apple Power Macintosh G3 300 (Blue & White) Specs

Identifiers: Blue & White - M6670LL/A - PowerMac1,1 - M5183 - None

All Power Macintosh G3 Models | All 1999 Models | Dynamically Compare This Mac to Others

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Apple Power Mac G3 BlueThe Apple Power Macintosh G3/300 (Blue & White), based on the Yosemite architecture, features a 300 MHz PowerPC 750 (G3) processor with 512k of backside cache, 64 MB of RAM, a 6 GB Ultra ATA/33 hard drive, a 32X CD-ROM drive, and an ATI Rage 128 GL graphics card with 16 MB of SDRAM.

The Power Macintosh G3 (Blue & White) series unveils a dramatically different translucent "blue and white" enclosure with a "fold down door" on the side that makes the system extremely easy to upgrade. It also introduced Firewire -- a then new high speed peripheral connection standard -- and was the first "pro" system to include USB (along with an ADB port for "legacy" use). It dropped traditional Mac serial ports and onboard SCSI.

Compared to earlier Power Macintosh G3 models, the Power Macintosh G3 (Blue & White) line -- in addition to the even easier-to-upgrade case -- uses generally faster processors, a faster motherboard design with a faster system bus (100 MHz compared to 66 MHz), faster RAM (PC100 compared to PC66), and a faster hard drive standard (Ultra ATA/33 compared to IDE/ATA-2).

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

  • Tech Specs
  • Ports
  • Popular Q&As

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

January 5, 1999 June 1, 1999
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.

Also see: All Macs introduced in 1999.
1 164
Details: This model only is compatible with the 32-bit Geekbench 2 benchmark. 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 PowerMac1,1 Model Identifier, which may include multiple models.

To dynamically compare Geekbench results from different Macs side-by-side, see'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.
100 MHz 150 MHz
Details: This system has a 150 MHz backside bus and 512k of level 2 cache.
Open Firmware 1 MB
Details: Boot ROM and around 1 MB, other instructions are loaded into RAM (NewWorld).
64k 512k (backside)
Details: The 512k of backside cache has a 150 MHz bus.
PC100 SDRAM 100 MHz
Details: Formally supports 100 MHz PC100 SDRAM (3.3v, unbuffered, 64-bit-wide, 168-pin). However, PC133 SDRAM is backwards compatible and may be used as well.
64 MB 1 GB
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 4
Details: There is no performance advantage to installing memory modules in pairs.
Rage 128 GL SDRAM
Details: The ATI Rage 128 GL graphics card with 16 MB of SDRAM occupies a 66 MHz PCI slot.
16 MB 16 MB
Details: N/A
Single Display 1600x1200
Details: Apple advertised that this system can support "up to 1600 by 1200 pixel resolution at 32 bits per pixel (millions of colors) and up to 85-Hz refresh rate."
None N/A
Details: N/A
6.0 GB N/A
Details: It also could be configured with Ultra2 SCSI drives at the time of purchase as a build-to-order option.

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) Ultra ATA/33 (ATA-4)
Details: Onboard support for two Ultra ATA/33 hard drives or SSDs -- drives larger than 128 GB are not supported natively..
32X CD-ROM None*
Details: The 32X CD-ROM drive uses a EIDE (ATA-3) bus. A 5X DVD-ROM drive was available build-to-order.

*This model shipped without a disk drive, but it could be configured with an internal Zip 100 drive as a build-to-order option.
56k (optional) 10/100Base-T
Details: 10/100Base-T Ethernet standard, internal modem optional.
None None
Details: N/A
2 (1.1) 2 (400)
Details: USB 1.1 ports share a single channel.
3 PCI* 4 3.5"
Details: *In the default configuration, this model has three open 33 MHz PCI slots and a 66 MHz PCI slot occupied by the graphics card.

It has four 3.5" drive bays (three are internal and intended for hard drives, and one is external and intended for a Zip 100 drive). By default, with a single drive installed, two internal 3.5" bays are free as is the external 3.5" bay. The system also has an external 5.25" drive bay occupied by the optical drive.
Apple USB Keyboard Apple USB Mouse*
Details: *This model shipped with an oft maligned "hockey puck" mouse.
Tower Power Mac G3 (Blue)
Details: N/A
M6670LL/A Blue & White
Details: The Apple order number should be unique to this system.
M5183 (EMC None) PowerMac1,1
Details: Please note that these identifiers refer to more than one model.

Also see: All Macs with the M5183 Model Number, the None EMC Number, and the PowerMac1,1 Model Identifier.

For more about these identifiers and how to locate them on each Mac, please refer to's Mac Identification section.
3.6V Lithium N/A
Details: N/A
8.5.1 X 10.4.11
Details: This system cannot run versions of MacOS X more recent than 10.4.11.
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.
17.0 x 8.9 x 18.4 30.0 lbs. (13.6 kg)
Details: In inches - height by width by depth, (43.2 cm, 22.6 cm, 46.7 cm).
US$1599 N/A
Details: 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 (VGA) None
Details: One 15-pin mini D-Sub VGA port.
1* None
Details: *The Power Macintosh G3 (Blue & White) models include a single ADB port for "legacy" use.
None None
Details: The Power Macintosh G3 (Blue & White) were the first "pro tower" models to drop traditional Mac serial ports (as well as onboard SCSI).
2 (1.1) 2 (400)
Details: USB 1.1 ports share a single channel.
1* (RJ-11) 1 (RJ-45)
Details: Internal 56k modem optional, 10/100Base-T Ethernet standard.
None None
Details: N/A
None* 1
Details: Includes a single analog 16-bit stereo sound in jack. Shipped with an external microphone.
1 None
Details: Includes a single rear mounted analog 16-bit stereo sound out jack.
1 N/A
Details: N/A
1 N/A
Details: 115V AC (90V to 132V AC) or 230V AC (180V to 264V AC). 200W maximum.

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

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