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Power Macintosh G3 (Blue & White)

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Power Macintosh G3(Blue & White)
The Blue & White Power Macintosh G3.
Developer
Apple Computer Inc.
Type
Desktop (Minitower)
Release date
January, 1999
Discontinued
August, 1999
CPU
PowerPC G3,300 450MHz

An open Power Macintosh G3 case, showing the logic board placement on the hinged door.
The Power Macintosh G3 series (commonly known as the "Blue and White G3", or sometimes just the "B&W G3" to distinguish it from the original Power Macintosh G3) was a series of personal computers designed, manufactured and sold by Apple Computer Inc. as part of their Power Macintosh line. It was introduced in January 1999, succeeding the original "beige" Power Macintosh G3, with which it shared the name and processor architecture but little else; it was discontinued in favor of the Power Mac G4 line in August 1999.
The Blue & White G3 used a modified version of the memory/PCI controller, the Motorola MPC106 (codenamed "Grackle"); it used the MPC106 v4. The I/O "Heathrow" had been replaced by "Paddington" (adding 100 Mbit Ethernet and power save features), the audio chip "Screamer" (on the beige G3's "Personality Card") had been replaced by "Burgundy", and other controllers for Firewire (Texas Instruments PCI-Lynx), for USB etc. were added.
Note that "Paddington" only handles the slow IDE bus for CD/DVD and ZIP, in fact it provides up to 16.6 MB/s like its predecessor "Heathrow". The fast IDE bus for the hard disks is an extra chip and provides up to 33 MB/s; this one is the problem in the Rev 1 blue/white G3s.
Though still based on the PowerPC G3 architecture, the G3 B&W was a totally new design. The first new Power Mac model after the release of the iMac, it used a novel enclosure with the logic board on the folding "door", which swung down onto the desk for easy access (a design that was also used on all Power Mac G4 models except for the Cube). It also introduced the New World ROM to the Power Macintosh line.
Hardware
The faster models (not the 300 MHz model) used the new copper-based PowerPC G3 CPUs made by IBM, which used about 25% of the power of the Motorola versions clock for clock. The B&W line ranged from 300 to 450MHz. Despite its 100MHz system bus and PC100 SDRAM, the 300MHz B&W G3 performed worse than its 300MHz Beige predecessor, because it had only 512KB L2 cache, half of what the 300MHz Beige had. The logic board had four PCI slots: three 64-bit 33MHz slots, and one 32-bit 66MHz slot dedicated for the graphics card, an ATI Rage 128 with 16MB SGRAM. Four 100MHz RAM slots accepted PC100 SDRAM modules, allowing the installation of up to 1GB of RAM with the use of 256MB DIMMs. The onboard ATA was upgraded to Ultra ATA/33 (in fact an extra UDMA-33 controller was added, see above), but SCSI was no longer present, having been replaced by two FireWire ports, a new standard (IEEE1394) running at 400Mbit/s (50MB/s) faster in theory than even the ATA/33 (33MB/s) hard drive controller. The serial ports were gone, too, having given way to two USB 1.1 ports (12Mbit/s), as implemented already in the iMac. The ADB port remained, as did the option for an internal modem. Also gone was the internal floppy disk drive. 100BASE-TX Ethernet was now standard, and audio was moved back to the logic board. A Zip Drive remained an option, and some configurations included a DVD-ROM drive and a DVD-Video decoder daughtercard for the graphics card, allowing hardware-assisted DVD video playback.
The blue-and-white Power Macintosh G3 was the first Power Mac with the "New World" architecture which only contained a small (approximately 1MB) boot ROM. When booting the Mac OS the Mac OS Toolbox and any other ROM patches installed would be loaded into ram (the former Beige G3 however was the first Mac with this ROM-in-RAM capability). Initially, many buyers chose to buy the older "Platinum" G3s instead, in order to maintain compatibility with existing peripherals.
The blue and white G3's case design was widely praised at the time for being easy to open up and work on. It had a door on the side that hinged down by pulling a latch at the top. No components needed to be removed or unplugged to open the case, and in fact it could be done with the computer running. The logic board was positioned in the door, providing easy access to all components. The hard drive(s) were mounted in a bracket affixed with one screw on the floor of the case. There was room for four internal hard drives. Removable drives were in a more conventional position at the top of the case.

The inside of the Power Mac G3
Early blue and white G3s ("Revision 1" units) had IDE controller problems related to the ATA/33 hard drive controller that made it impossible to connect two hard drives and prevented the use of newer drives. Using newer ATA drives in those units resulted in data transmission...(and so on) To get More information , you can visit some products about , . The Emergency Wind-up Flashlight(SB-3049),LED Flashlight,LED torch products should be show more here!

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