An improved interconnection assembly is configured to couple to only one of a first daughter card having a first arrangement of connectors and a second daughter card having a second arrangement of connectors. The interconnection assembly includes a motherboard and motherboard connectors. The motherboard...http://www.google.com.hk/patents/US7097477?utm_source=gb-gplus-share專利 US7097477 - Techniques for controlling coupling between a motherboard and a daughter card
