Your 680x0 Mac is starting to show its age. It's served faithfully, but you're tired of watching friends' PowerPC-native applications blaze. And you suspect (justifiably) that Apple won't be supporting 680x0 machines in future system-software rollouts.
The time has come to upgrade to a PowerPC processor. But with all the upgrade cards, processor swaps, and motherboard replacements, which path do you take? Use these charts to find the upgrade options for your Mac. Find your Mac in the list on the left, and note the path number we've assigned it. Then find the box with the corresponding path number to see how you can upgrade your Mac.
A couple of caveats: Be aware that your older Mac may not perform as speedily as Power Macs with similar processors, owing to older data-bus architectures, slower hard drives and video cards, and so on. Also, know that although upgrade cards will let you use PowerPC-native software, they won't let you run Copland, Apple's upcoming PowerPC-only operating system, which will work only on Macs that have PowerPC chips on the motherboard.
Finally, be aware that Apple has dropped logic-board upgrades to Power Mac 6100, 7100, and 8100 status from its price list. There are still a few floating around at dealerships, but if you want one, find it fast and buy it.
NOTES: System 7.5 is required by, but not included with, these cards; it'll cost an extra $98 to buy System 7.5 from Apple. These cards are user-installable -- just plug one into your Mac's PDS. Comes with a 256K cache. A supplied control panel lets you switch between the PowerPC processor and the motherboard's 68030 processor.
Path 2
UPGRADE: Apple Power Mac 7100 motherboard ($1,599).
TYPE: Motherboard replacement.
PROCESSOR: 80-MHz PowerPC 601.
NOTES: Requires dealer installation (about $50). Once you get the 7100 motherboard, you'll probably want to add more RAM as well. Be sure to get the L2 cache -- it's well worth the extra $125 to $260.
Path 3
PREREQUISITE: Upgrade Performa- and LC-class Macs to Performa 475/LC 475.
POWERPC UPGRADE: Apple 50-MHz Processor Upgrade ($659); DayStar 100-MHz PowerCard ($999) or 50-MHz PowerCard 601 ($649).
TYPE: Processor replacement.
PROCESSOR: 100- or 50-MHz PowerPC 601.
NOTES: These upgrade processors replace the 68040 chip on your system's motherboard. The Apple upgrade must be installed by a dealer (about $50); it includes System 7.5 and ClarisWorks 3.0. The DayStar upgrade, which includes System 7.5, is sold as a do-it-yourself kit, with tools and instructions. But beware: Installation can be tricky.
Path 4
PREREQUISITE: Upgrade Performa- and LC-class Macs to Performa 575/LC 575 or better.
POWERPC UPGRADE: Apple 66-MHz Processor Upgrade ($659); DayStar 100-MHz PowerCard 601 ($999) or 66-MHz PowerCard 601 ($649).
TYPE: Processor replacement.
PROCESSOR: 100- or 66-MHz PowerPC 601.
NOTES: These upgrade processors replace the 68040 chip on your system's motherboard. The Apple upgrade must be installed by a dealer (about $50); it includes System 7.5 and ClarisWorks 3.0. The DayStar upgrade, which includes System 7.5, is sold as a do-it-yourself kit, with tools and instructions. But beware: Installation can be tricky.
Path 5
POWERPC UPGRADE: DayStar 100-MHz PowerPro 601 ($1,299) or 40/50-MHz PowerPro 601 ($529); Apple Power Mac 6100 motherboard ($1,049).
TYPE: The DayStar upgrades are PDS cards. The Apple upgrade is a motherboard replacement.
PROCESSOR: The DayStar cards use a 100-, 50-, or 40-MHz PowerPC 601 processor. The 6100 motherboard contains a 66-MHz PowerPC 601.
NOTES: The 100-MHz DayStar card works at 80 MHz in the Centris 610. It requires System 7.5 (not included -- $98); a NuBus-card adapter ($79) is also required. An included control panel lets you switch between the PowerPC processor and the motherboard's 68040 processor. The 6100 motherboard comes with 8 MB of soldered-on RAM and two 72-pin DRAM SIMM slots.
Path 6
UPGRADE: DayStar 100-MHz PowerPro 601 ($1,299); Apple 7100 motherboard ($1,599).
TYPE: The DayStar upgrade is a PDS card. The 7100 motherboard comes with an 80-MHz PowerPC 601.
PROCESSOR: 100- or 80-MHz PowerPC 601
NOTES: The DayStar card is user-installable. It requires, but doesn't ship with, System 7.5 ($98 from Apple). An included control panel lets you switch back and forth between the PowerPC processor and the motherboard's 68040 processor. The 7100 motherboard must be installed by a dealer (about $50). Be sure to get the L2 cache -- it's well worth the extra $125 to $260.
Path 7
UPGRADE: Apple Power Mac 6100 motherboard ($1,049).
TYPE: Motherboard replacement.
PROCESSOR: 66-MHz PowerPC 601.
NOTES: The 6100 motherboard uses a PowerPC 601 processor and comes with 8 MB of soldered-on RAM and two 72-pin DRAM SIMM slots.
NOTES: The DayStar cards are user-installable and require, but do not ship with, System 7.5 ($98 from Apple). A control panel lets you switch between the PowerPC processor and the motherboard's 68040 processor.
Path 9
UPGRADE: Apple Power Mac 8500 motherboard.
TYPE: Motherboard replacement.
PROCESSOR: 120-MHz PowerPC 604.
NOTES: The 8500 motherboard gets you a PowerPC 604 on a daughterboard, meaning that future processor upgrades should be as easy as swapping a board (and not necessarily from Apple). Quadra 800-series owners can take half a step up and upgrade to a Power Mac 8100, for $1,999. Availability and price are yet to be determined.
Path 10
UPGRADE: Apple Power Mac 5300/6300 motherboard ($699 to $799).
TYPE: Motherboard replacement.
PROCESSOR: 100-MHz PowerPC 603e.
NOTES: Comes with 1 MB of VRAM. Requires installation by dealer (about $50). Performa 630 owners will need to buy more RAM. This upgrade won't be available until early 1996.
Path 11
UPGRADE: Apple Power Mac 7500 motherboard.
TYPE: Motherboard replacement.
PROCESSOR: 100-MHz PowerPC 601.
NOTES: Requires dealer installation (about $50). The 7500 motherboard has the processor on a daughterboard to make future processor upgrades simple. Availability and price are yet to be determined.
Path 12
You're out of luck: There aren't any upgrade paths for these machines. Pony up for a new PowerPC-based system; to get extra speed, try Connectix's Speed Doubler ($55); or add more RAM. For Power Mac models, you might also try adding a Level 2 cache ($125 to $260); using a clock accelerator from Newer or Alacrity (each about $100 to $300); or if you can find one, try a PowerPC 604-based Total Power application-accelerator card (about $1,500, from Total Impact).
Path 13
These machines are part of the current Macintosh line and are too current to have an upgrade path. Since their processors are on daughterboards, upgrading the processors will simply involve a daughterboard swap. And instead of having only one source (Apple) for getting new processors, you can expect third-party vendors to offer solutions. If you need extra speed now, you can use Connectix's Speed Doubler ($55) or any of the clock accelerators from various vendors or you can add more RAM.