{"id":1541,"date":"2021-04-13T20:13:34","date_gmt":"2021-04-13T19:13:34","guid":{"rendered":"https:\/\/elephantandchicken.co.uk\/stuffandnonsense\/?p=1541"},"modified":"2021-04-13T20:13:34","modified_gmt":"2021-04-13T19:13:34","slug":"sonnet-7455-based-pci-upgrade-cards","status":"publish","type":"post","link":"https:\/\/elephantandchicken.co.uk\/stuffandnonsense\/?p=1541","title":{"rendered":"Sonnet 7455 Based “PCI” Upgrade Cards"},"content":{"rendered":"\n

Sonnet 7455 Based “PCI” Upgrade Cards<\/h2>\n\n\n\n

The Highest speed of Sonnets “PCI” (as in, for most PCI based beige Macs, rather than it fits in a PCI slot) G4 upgrade cards used a different PCB and Motorola’s 7455 G4 Chips. These boards can be a little unstable and I’ve never had any luck using them with the actual Sonnet drivers. These cards were available with a 700, 800 and 1000MHz processor.<\/p>\n\n\n\n

\"Sonnet<\/figure>\n\n\n\n

The most stable solution I have found is to use the PowerLogix CPU Director drivers, with Speculative Addressing disabled.<\/p>\n\n\n\n

To speed up the process of getting this set up, I have created an installer for Mac OS 9 which installs the PowerLogix software, as well as a system preference which has the settings already enabled as required.<\/p>\n\n\n\n

Download the installer here.<\/a><\/p>\n\n\n\n

The download is a .bin file, which can be opened in Stuffit Expander. Inside the .bin file is an installer application called Sonnet7455.<\/p>\n\n\n\n

The process…<\/p>\n\n\n\n

  1. With the previous CPU still in the computer, install this software, once done, power down the computer.<\/li>
  2. Remove the previous CPU and install the Sonnet Upgrade.<\/li>
  3. Make sure the CPU card is firmly seated.<\/li>
  4. Seriously, double check it – they can be quite stiff and if they’re not properly seated you might kill the computer or card.<\/li>
  5. Really – check it again, I lost a 500MHz G3 like this. Stupid thing resisted so much I thought it was in properly, and it was one of the ones without the tall bracket so I didn’t notice that it was higher than it should have been in my 8600.<\/li>
  6. Press the “Cuda” button. Usually a little red tactile switch. Press it once, for about one second. Do not long press it. Do not press it lots of times.<\/li>
  7. Close up the case and boot the machine up. You will have lost all your mouse \/ date and time etc. settings due to pressing the Cuda button, so they’ll need resetting.<\/li><\/ol>\n\n\n\n

    At this point you should be good to go, although these upgrade cards are known for having incompatibilities. I have seen the following issues :<\/p>\n\n\n\n