Up for sale is a DayStar Digital cache card adapter for the Macintosh II desktop. These adapters were designed to interface a 68030 PowerCache or Turbo 040 accelerator to a Macintosh II system. I do not know if the Turbo 601 is compatible, but I would assume not. You may also need the FDHD ROM upgrade on your Macintosh II in order to use an accelerator, but please do your own research before purchasing to confirm. Thank you for looking and have a great day!