Power Macintosh G3/266 Processor Upgrade Page
The processor and cache reside in on a removable card that fits into a PC type Zif socket making it easy to replace with a faster processor. The main system bus of these G3 machines runs at 66Mhz (previous Macs ran at 50Mhz). The G3/266 comes with 32MB SDRAM, expandable to 768 MB using the 3 DIMM sockets (standard profile 128MB DIMMs will not fit in the desktop machine). The graphics controller is the ATI 3D Rage II+ and the machine come standard with 2MB SGRAM graphics memory which allows for millions of colors (32-bit) at up to 832 x 624 resolution. Graphics memory is expandable to 6MB which will allow millions of colors at higher resolutions and faster 3D performance. There are 3 PCI slots for add on cards and a proprietary slot for the included personality card. The drive is a 4GB EIDE on the Desktop and 6 GB on the Tower, and the CD ROM is 24x. The Tower machine has one free 5.23" drive bay (the other is filled with the internal Zip drive) and both machines have external SCSI connectors (5Mbytes per second). The machine case is easy to get into and the simplicity of the new logic board design make upgrades a snap.
Below you will find the MacBench 4.0 results for most of the processor upgrades available for this machine. These results are what the individual manufactures publish for their cards. In other words the speed trials were run by the manufacturer. For an independent evaluation of these cards check the Processor Upgrade Page to see if we have results available. The bar graphs below express results as a percentage of improvement over the base machine, which receives a score of 100%. Further down the page you will find a table with the actual MacBench score.
MacBench Absolute Scores