Absolutely, If yours had a System Saver on it when the Radius distributor installed those boards, the fan/air dam may have been been deemed unnecessary and could have been left out of the mix. If the cards were installed by an end user who wanted a fast, silent computer (high temperature oven) and left them out . . .

Did your Plus come with a side of FPD? That was one POWERHOUSE of a DTP workstation back in the day!