HP D3326-69003 - Processor board with 100MHz Pentium processor - Processor Board (with 100MHz Pentium Processor IC) - Plugs into the System (Mother) Board Retail
HP D2186-69001 - Processor board with 66MHz 486DX2 processor - Processor Board (with 66MHz 486DX2 Processor IC) - Plugs into the System (Mother) Board Retail
HP D2997-69004 - Processor board with 90MHz Pentium processor - Processor Board (with 90MHz Pentium Processor IC) - Plugs into the System (Mother) Board Retail
HP A1409-69002 - Processor board - Processor Board (for all Configurations) - Plugs into the Backplane Board - for HP Repair Use ONLY Retail