Original Apple, fully tested 68040/33MHz Logic Board for the LC 580, Performa 580, LC 630 and Performa 630 with 1 RAM slot and DOS compatibility. This logic board has had it's original 33MHz 68LC040 processor upgraded to a 33MHz 68040 which includes a floating point unit (FPU).
This logic board is interchangeable with the rest of the Performa and LC 5XX series as well as the 5XXX series.