Processor: 040@40Mhz FPU: Internal MMU: Internal Max Ram: 128MB (256MB if SCSI module attached) Ram Type: 1x72Pin SIMM. SCSI-II: Optional (has 2nd SIMM slot on board) This board is recommended by Phase 5 to be used in towered A1200's only due to cooling problems. ERC refers to the processor being recycled, that is removed from and old machine such as a Mac.