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  1. trodemaster

    Centris 650 Not recognizing PDS PPC upgrade card 820-0562-A

    Ah that was it! Thank you! So this software does not work on 7.6.1 https://www.macintoshrepository.org/39758-apple-power-macintosh-upgrade-card-drivers-m2843ll-a- The "601 Processor Upgrade" control panel in 7.6.1 is not correct. This is the one that works...
  2. trodemaster

    Centris 650 Not recognizing PDS PPC upgrade card 820-0562-A

    I extracted what seems to be the correct control panel for 7.6.1 and it throws an error. I'll do more testing once the contact cleaner shows up and I have more time. Boot chime is just the quadra one with the card installed or not.
  3. trodemaster

    Centris 650 Not recognizing PDS PPC upgrade card 820-0562-A

    When cleaning the contacts, I have only used rubbing alcohol and a dust-free cleaning cloth, so using something stronger is up next. Re-seated it a couple of times and confirmed the connector is fully butted up against the socket. Heatsink repasted with careful attention to the hook on the far...
  4. trodemaster

    Centris 650 Not recognizing PDS PPC upgrade card 820-0562-A

    I'm working on a Centris 650 build and was excited to add this Apple-branded PPC 601 820-0562-A Upgrade card to the system. I have installed these a few times in the past and it was trivial. However, when I insert this card, it does not seem to be recognized by the system. I have used TattleTech...
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