hahahahaha. I laugh at your ignorance. ;) It's interesting how at first there were SIMMs (single inline memory modules) and then came Pentium and we had to start installing them in pairs. Then they started making DIMMs (dual inline memory modules) so we woudln't have to install our modules in pairs. But, now with dual channel memory controllers we have to install even our DIMMs in pairs. When will the madness end? When I ask you? My prediction for the future: QIMMs (quad inline memory modules). But the computer market never follows my logic. I'm still waiting for Hexium processors, the logical successor to the Pentium.