This index covers desktop Macs based on the 68040 CPU. This includes all Centris and Quadra models, plus some LCs and Performas.

• PowerPC 601 Upgrades for 68040 PDS Macs, Daniel Knight, 2016.08.31
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• Add a Second SIMM Slot to Your Quadra, LC, or Performa 630, Chris Placzek, Memory Upgrade Options, 2016.08.25
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• Sonnet QuadDoubler Accelerators, Daniel Knight, Mac CPU Upgrades, 2016.02.13
• Overclocking the Quadra AV Models, Overclocking Your Vintage Mac, 2014.09.16
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• Overclocking the Mac Quadra Series, Overclocking Your Vintage Mac, 2014.09.16
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• Overclocking the Mac Centris Series, Overclocking Your Vintage Mac, 2014.09.16
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• Apple’s AAUI Ethernet Connector, Daniel Knight, Low End Mac Tech Journal, 2007.09.04
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• Apple Rolled Out 6 New Macs at Once in February 1993, Daniel Knight, Mac History, 2003.02.10
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• Quadra AVs and Some Cool Things You Can Do with Them, Adam Robert Guha, Apple Archive, 2001.08.10
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• QuadServer: Quadra 605 or 650?, Daniel Knight, Mac Daniel, 2000.11.28
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• Converting a Quadra 630 into a Power Mac 5200, Jeffery Adkins, Mac Lab Report, 2000.11.22
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• Don’t Upgrade That Quadra 630, Adam Robert Guha, Apple Archive, 2000.08.18
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• Options for ‘040s, Adam Robert Guha, Apple Archive, 2000.06.05. Advice about operating systems, upgrades, what Quadra to choose, and more.
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• Games for ‘040s, Low End Mac Gaming, Brian Rumsey, 2000.02.25. This week Brian looks at games to play on 68040-based Macs.
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• Gaming on ‘040s, Brian Rumsey, Low End Mac Gaming, 2000.02.16. Those old 68040-class Macs still have game.
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• How Can I Improve My LC 475?, Daniel Knight, Mac Daniel, 1999.06.28
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• Replacing the Hard Drive in a Mac IIcx, IIci, or Quadra 700, Daniel Knight, 1999.04.10
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• Upgrading a Quadra 610, Daniel Knight, Mac Daniel, 1999.01.13
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• Upgrades for a Performa or Quadra 630, Daniel Knight, Mac Daniel, 1999.01.06
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• Upgrades for a Centris 610, Daniel Knight, Mac Daniel, 1999.01.06
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• What’s the Best System Version for My Mac?, Daniel Knight, Mac Daniel, 1998.12.28
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• What Can I Do with a Quadra or Centris 650?, Daniel Knight, Mac Daniel, 1998.12.24
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• How Should I Upgrade My Quadra or Performa 630?, Daniel Knight, Mac Daniel, 1998.12.11
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• What About PowerPC Upgrades for the Quadra 700 or LC 475?, Daniel Knight, Mac Daniel, 1998.11.23
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• Is Upgrading My Centris 650 Worth It?, Daniel Knight, Mac Daniel, 1998.10.26
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• Centris 650 and Quadra 650, Best Buys in Used Macs, 1998.03.10
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• Hard Drive Problems on the Centris and Quadra 610 with Silverlining 5.5 or Later, Scott L. Barber, Low End Mac Tech Journal, 1997.12.11
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• 68040-based Macs can use the HFS+ file system that comes with Mac OS 8.1, but they cannot boot from an HFS+ disk or use one for virtual memory.
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• Drive Setup now supports many third-party hard drives. We’re maintaining a compatibility list.
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• RAM Charger from Jump Development ($40) lets you get the most out of your RAM – especially helpful on Macs with 8 MB or less. By launching applications using the minimum amount of memory they need, RAM Charger lets you run more programs. It also works well with RAM Doubler. You can even download a demo.
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• NuBus Video Card Guide for information on adding a video card.