Power Macs
 iMac Channel
Computer Profiles
 Power Mac
 Mac Clones
 Older Macs
Editorial Archive
Mac Daniel's Advice
Email Lists
LEMchat (uses AIM)
Online Tech Journal
 advice, reviews
 guides, deals
Apple History
Best of the Web
 Best of the Mac Web surveys
Miscellaneous Links
 Used Mac Dealers
 Video Cards
 Mac OS X
 Mac Linux
 RAM Upgrades
About Low End Mac
Site Contacts

Open Link

Support LEM


The Apple Store
The iTunes Store
PC Zone
Crucial Memory

Our advertising is handled by BackBeat Media. For detailed price quotes and advertising information, please contactat BackBeat Media (646-546-5194). This number is for advertising only.


Visit DayStar's Processor Upgrade page.

Robert Art Morgan of Bare Feats fame drops a DayStar Turbo 601 into his IIci.

PowerCache (40 MHz 68040) in Mac II

Marconi reports:

I've been very pleased with the DayStar board. It breathed new life into my tired old Mac II and kept me (more or less) happy for a long, long time. The addition of RAM Doubler helped too. I used that as my primary Mac until the PowerMac 8500 came out, then I upgraded. The Mac II became a modest Web, Mail and Mail list server on a full-time Internet connection.

I never could, however, get the 4 MB SIMM's to work. I even bought a Mac IIx motherboard and a new adapter board for the PowerCache so I could transfer the accelerator into the IIx (avoiding the ROM bug which prevents 4 MB SIMMs in Bank A). Chimes of death every time. I ended up buying a first generation PowerMac to use for my server because I absolutely needed more RAM.

Today the Mac II with its 40 MHz, 68040 PowerCache board and 8 MB of RAM is still going strong on my home intranet. I control it with Timbuktu Pro and use it for ftp and other tasks so that I don't tie up my Powermac 8500.

Installation is pretty simple but the adapter boards that plug into your motherboard have a *lot* of pins which must all be properly alligned. The Mac II adapter has two such socket/pins sets which must be lined up, the IIx adapter has only one. (And the IIx adapter has a socket to hold the removed 68030 so that it still works when the PowerCache is removed!) I had the adapter board in and out of the Mac II many times while trying to get 4 MB SIMMs to work and always got things lined up again -- it just pays to be very careful. Handle the adapter with care to avoid bending the pins.

Go to Mac II.

Low End Mac is an independent publication and has not been authorized, sponsored, or otherwise approved by Apple Inc. Opinions expressed are those of their authors and may not reflect the opinion of Cobweb Publishing. Advice is presented in good faith, but what works for one may not work for all.
  Entire Low End Mac website copyright ©1997-2016 by Cobweb Publishing, Inc. unless otherwise noted. All rights reserved. Low End Mac, LowEndMac, and are trademarks of Cobweb Publishing Inc. Apple, the Apple logo, Macintosh, iPad, iPhone, iMac, iPod, MacBook, Mac Pro, and AirPort are registered trademarks of Apple Inc. Additional company and product names may be trademarks or registered trademarks and are hereby acknowledged.
  Please report errors to .
  LINKS: We allow and encourage links to any public page as long as the linked page does not appear within a frame that prevents bookmarking it.
  Email may be published at our discretion unless marked "not for publication"; email addresses will not be published without permission, and we will encrypt them in hopes of avoiding spammers. Letters may be edited for length, context, and to match house style.
  PRIVACY: We don't collect personal information unless you explicitly provide it, and we don't share the information we have with others. For more details, see our Terms of Use.