HP D3356-69001 - Processor board with a single socket for a 133MHz Pentium processor and six SIMM sockets - Processor Board (with a Single Socket for a 133MHz Pentium Processor IC and Six SIMM Sockets) - Plugs into the System (Mother) Board Retail
HP D4256-69001 - Processor board - Has two processor sockets and four DIMM sockets - Processor Board (Small Horizontal Board) - Has Two Processor IC Sockets and Four DIMM Sockets Retail
