System Processor Spacer Board LCNP4M TDC-3000 Brand :- Honeywell Part No :- 51403775 Assy No :- 51403776-100 The LCNP4(x) uses the faster 68040 microprocessor and has 16 MW of memory. The LCNP4M introduced a shorter board and support for 3.3 volt PCI-X sockets. LCNP4(G)(M) can only be used with GUS release R110.1 or higher. Newer PC's with space restrictions or 3.3 volt PCI-X slots will require the LCNP4M.