https://community.graphisoft.com/t5/Installation-update/64-BIT-PC/m-p/13031#M1619 AFAIK AC is not 64 bit. As for performance if you have WinXP 64 you might see some OS performance and thus AC might seem to go faster. Fri, 08 Jul 2005 19:22:51 GMT Eduardo Rolon 2005-07-08T19:22:51Z https://community.graphisoft.com/t5/Installation-update/64-BIT-PC/m-p/13030#M1618 <DIV class="actalk-migrated-content"><T>How does ArchiCAD 9.0 interact with a 64 bit proccesor? I will notice any performance?</T></DIV> Fri, 08 Jul 2005 13:20:58 GMT https://community.graphisoft.com/t5/Installation-update/64-BIT-PC/m-p/13030#M1618 Anonymous 2005-07-08T13:20:58Z https://community.graphisoft.com/t5/Installation-update/64-BIT-PC/m-p/13031#M1619 AFAIK AC is not 64 bit. As for performance if you have WinXP 64 you might see some OS performance and thus AC might seem to go faster. Fri, 08 Jul 2005 19:22:51 GMT https://community.graphisoft.com/t5/Installation-update/64-BIT-PC/m-p/13031#M1619 Eduardo Rolon 2005-07-08T19:22:51Z