Dear,Is it still valid for the following message, i mean on SCCM 2007 SP1 and R2? Are there fix or redesign for support 64-bit hardware? "Configuration Manager is a 32-bit application, so performance will not be as great on a 64-bit hardware as a native 64-bit application would provide. To ensure best results, install the 32-bit version of the Operating System even when working with 64-bit capable hardware.The reduction in performance capabilities when using 64-bit hardware to host Configuration Manager installations (a 32-bit application) is small compared to using 32-bit hardware but should be anticipated before implementing this software and hardware combination."refer to http://technet.microsoft.com/en-us/library/bb932180.aspxThank in advance.Thana

Hi,We have installed ConfigMgr. on several 64 bit machines and the performan is great.Kent Agerlund | http://scug.dk/members/Agerlund/default.aspx | The Danish community for System Center products

Hi, Actually, SCCM is a 32-bit application, but don't worry about the performance when running on 64-bit OS.

Rumor has it that SCCM 2011 ( the next version of SCCM, aka vNext) will be a 64 bit only site server application.Scott

It isn't a rumor, it was presented by Josh and Bill at MMS 2009. Taken from their slides:Minimum System Requirements:64-bit Windows for all site servers and site roles except:Branch DPs will run on SCCM.next client OS supported platformsWin 2003 32-bit will be supported on file share only Standard DPs.SQL 2008 – only 64-bit editionsWin 2008 64-bit (some may require 2k8 R2)http://www.sccm-tools.com http://sms-hints-tricks.blogspot.com