Power Macintosh G3 Blue&White

In mid-1998, Apple released iMac - a new all-in-one computer with unusual case and stylish shape. Lots of transparent and white plastic made the computer closer to applied art and definitely abandoned the "white box" case. iMac was characteristic and distinguishable. However, Power Macintosh line computers were still in a beige box casings. There was one all-in-one Power Mac with quite stylish line, but it was not widely accessible. In early 1999, Apple released a re-designed Power Mac, with style similar to iMac - translucent case with large, but a bit blurred "G3" text, blue-green front panel colour and big Apple logo were characteristic parts of a new Power Macintosh G3, internally called "blue and white". As with power Macs, new technologies have been used: RAM is in 100MHz DIMM modules and there are new FireWire and USB connectors. Although this model did not left ADB peripheral connector behind, keyboard and mouse supplied were connected to USB. However, serial ports and floppy drive has been dropped.
This is the first model of its series - it contains 300MHz PowerPC G3 CPU and PCI graphics board. By default, it came with 6GB ATA hard drive and 64MB of RAM, it allows for comfortable operating in Mac OS 8.5 as well as later 9.2 version. The graphics board, used in PCI slot was ATI XClaim VR first (in fact a Rage PRO with 4MB of RAM) and in a bit later models a full 16MB ATI Rage 128. This line was kept until Power Mac G4 has been introduced in August 1999.

Model No: M5183

Year: 1999
Discontinued: 2000
CPU: PowerPC G3 300MHz
RAM: 128MB
Max. RAM: 1GB
RAM Type: 4 PC100 DIMMs
Hard disk: 10GB IDE, 3.5" SL
Floppy drives: None
Other drives: CD-ROM
Graphics: PCI (ATI RAGE PRO 2x)
Known as ATI XClaim VR, 4MB
Sound: 3.5mm Jack sound input / output (Stereo), one built-in speaker.
Display: Depends on graphics card installed (default: VGA or Mac-VGA)
Dedicated OS: Mac OS 8.5
Maximum OS: Mac OS X 10.4
Expansions: USB, FireWire, Internal modem connector, AirPort internal expansion, ADB, 3 PCI slots.

Additional peripherals in collection:
 - Original Apple USB keyboard.

Connectors:  - 2 USB connectors
 - 2 FireWire connectors
 - Ethernet connector
 - Audio in/out
 - Graphics card output.
 - ADB connector



My unit has been used in some studio for scanning, so it had a SCSI board and LinoColor scanner software (to e.g. Saphil Ultra2 maybe?). Shortly after purchasing, its hard disk has been upgraded to 10GB one (9GB in Apple's notation) and RAM was doubled to 128MB. In last years of operation the RAM has been upgraded even more to 512MB. It was retired around 2015. Later, the SCSI board has been removed, as well as ISDN board and additional network board.

Here you'll find:

Overclocking   Links  


Overclocking is relatively simple - there are jumpers for it(covered with warranty seal) and they are even labeled like "SPEED CONTROL" in some mainboard revisions. However, there are a few things to consider:
1. The CPU is not cooled directly any way. The heatsink just is in the mainboard, the air flow naturally caused by fans cools it down.
2. Avoid increasing system bus speed. This makes more problems than it cures by overclocking all buses in a system.
3. Maintain temperature. Vertical position of this CPU is not fortunate, so before any overclocking check thermal compound too.

So the settings are (S - Short with jumper) (source: xlr8yourMac):

Multiple (CPU MHz) 4 3 2 1 -----> To the connectors ------->
3x (300MHz)   S S S Default for 300MHz unit
3.5 (350MHz)       S Default for 350MHz unit
4 (400MHz)   S   S Default for 400MHz unit, 350 was overclocked to it
4.5 (450MHz S       In 400MHz CPU, thermal starts to complain
5 (500MHz)   S    


5.5 (550MHz)   S S  
6 (600MHz)     S  
6.5 (650MHz) S   S  
7 (700MHz) S S   S

http://lowendmac.com/2002/overclocking-the-blue-and-white-g3/ - Overclocking description
http://www.xlr8yourmac.com/G3-ZONE/yosemite/OC.html - Exact description what "Speed control" jumpers do.
http://www.xlr8yourmac.com/G3_OC/tims.html - Advanced overclocking description in the lab notes
Warning: In the lab notes, xlr8yourmac placed jumper "1" closer to the front of mainboard - jumper 1 is closer to connectors, to the rear!

 - http://apple-history.com/g3blue - Description in Apple History, as well as comment about version with better ATA chip and HDD rack released in mid-1999.