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Power Macintosh G3/450 Information And Performance Page - Apple's Tower of Power

  Without the crowds of an expo or a developers conference and with little fanfare, Apple has quietly given their line of Yosemite G3's a speed bump. Models now range from 350MHz to 450MHz. While this latest round of blue and white towers don't feature any radical design changes, there have been a few improvements under the hood. Apple has thankfully standardized on a full 1MB backside cache on all machines instead of short changing the low end model with a 512k cache. The CD-ROM drive was also boosted across the line, from 24x to 32x. Rumors on the net indicate that Apple will be standardizing on DVD drives down the road which will be especially welcome in the gaming community. Think of Riven on one disk and you get the idea. Graphics are still handled by the high-end ATI RAGE 128 graphics accelerator and 16MB of SDRAM graphics memory making them appropriate for high-end graphics work and superb gaming. The G3/450MHz comes with 128MB of PC100 SDRAM (3.3-volt, unbuffered, 64-bit-wide, 168-pin, running at 100 MHz) and can be upgraded to 1GB using the 4 provided memory slots. Memory from prior Power Macintosh (EDO or FPM RAM) computers cannot be used in the new systems. The Yosemite class machines are the easiest Macs to get inside produced to date. The side panel easily swings down when a lever on the side of the machine is pulled - exposing the innards of the computer. Inside you will find 4 PCI slots, 3 slots running at 33Mhz (64 -bit) and one special high speed 66Mhz, 32-bit PCI slot. The 66MHz slot is filled with the ATI RAGE 128 graphics accelerator) and one of the 33MHz slots is filled with a SCSI controller for the hard drive. There is, of course, no built in SCSI bus or floppy drive. Other Yosemite innards include 5 internal drive bays with built in support for the new Ultra ATA drives ( three for 3 1/2-inch hard drives and 2 for 5 1/4-inch drives - CD ROM, Zip, DVD etc.). The Yosemite Power Macs come standard with a built-in slot to accommodate an internal 56K modem that supports both the 56k flex and V.90 standards. The actual internal modem is an add-on option.

Apple continues to stick to its guns with the connection standards introduced earlier. It has eased out SCSI in favor of two 400Mbps FireWire ports (for connecting high-speed peripherals such as drives and video) and continued the abandonment of the serial port it started with iMac in favor of two 12Mbps USB ports for connecting low speed devices (such as keyboards, mice etc). In a nod to the past it included one ADB port on the machines so you can connect your old mouse, keyboard, graphics tablet or other ADB device. All machines come with 10/100BaseT Ethernet. 

For connecting monitors these machines have moved to the "PC", VGA port standard. If you want to connect an older Mac monitor you'll have to use the included VGA-to-Mac adapter. The ATI RAGE 128 graphics accelerator supports up to 1,920- by 1,200-pixel resolution at 32 bits per pixel (millions of colors)

In looks the Yosemite machines take the traditional mini-tower form factor and cover it all with a iMac type frosting made of the same bullet-proof plastic found encasing the iMacs. At each corner is found a sturdy handle making it easy to move the machines around. If the Yosemite machines aren't as radical a design departure as the iMac was, they are still quite stunning in appearance. 


MacBench 5.0 Scores

MacBench Scores are relative to the Pre-Yosemite G3/300 Power Mac which is assigned a score of 1000. Longer bars are better. Click here for more information on MacBench 5.0

BYTEmark Scores


Model/Mhz Bus Speed
RAM Backside
VRAM Expansion

Yosemite G3/450


1GB Max

1MB at 225MHz


3 PCI slots (2 free) running at 33Mhz (64 -bit)

One 66Mhz, 32-bit PCI slot filled with the ATI RAGE 128 graphics accelerator

Modem Slot


Reviews & Information

9GB Ultra2 LVD SCSI with PCI card


10/100 Ethernet

ATI RAGE 128 accelerated 2D/3D graphics controller

2 USB Ports

2 FireWire Ports