https://community.hpe.com/t5/bladesystem-general/adding-a-processor-to-server/m-p/4410177#M5836 (Disclaimer: I'm not very familiar with current Microsoft server products: last time I worked with MS servers was with NT4 and early Win2k.)<BR /><BR />If the existing processor is dual-core and both cores are working correctly before the upgrade, your server should already be multiprocessor-capable and no rebuild is needed.<BR /><BR />If the existing processor was a single-core model, it might be necessary to switch to a multiprocessor HAL. However, Microsoft documentation seems to say that Windows 2003 can do that automatically when necessary: adding an extra CPU will cause "New Hardware Detected" at next system boot, and it will automatically install the multiprocessor HAL and reboot if necessary.<BR /><BR /><A href="http://support.microsoft.com/kb/309283" target="_blank">http://support.microsoft.com/kb/309283</A><BR /><BR />Even the lowest "Web Edition" of Windows 2003 can support two processors (even if they are dual- or quad-core ones), so it looks like there won't be a rebuild for licensing reasons either.<BR /><BR />MK Wed, 29 Apr 2009 11:07:01 GMT Matti_Kurkela 2009-04-29T11:07:01Z https://community.hpe.com/t5/bladesystem-general/adding-a-processor-to-server/m-p/4410176#M5835 Hi,<BR />I want to add a 2nd processor to a BL460c running Windows 2003 (with SAP CRM).<BR />"Microsoft ACPI-Compliant System" is listed in the Device Manager.<BR /><BR />I know in certain situations a rebuild is required.<BR />Can i ask for input pls?<BR />thanks<BR /> Wed, 29 Apr 2009 10:04:49 GMT https://community.hpe.com/t5/bladesystem-general/adding-a-processor-to-server/m-p/4410176#M5835 Francis Flan 2009-04-29T10:04:49Z https://community.hpe.com/t5/bladesystem-general/adding-a-processor-to-server/m-p/4410177#M5836 (Disclaimer: I'm not very familiar with current Microsoft server products: last time I worked with MS servers was with NT4 and early Win2k.)<BR /><BR />If the existing processor is dual-core and both cores are working correctly before the upgrade, your server should already be multiprocessor-capable and no rebuild is needed.<BR /><BR />If the existing processor was a single-core model, it might be necessary to switch to a multiprocessor HAL. However, Microsoft documentation seems to say that Windows 2003 can do that automatically when necessary: adding an extra CPU will cause "New Hardware Detected" at next system boot, and it will automatically install the multiprocessor HAL and reboot if necessary.<BR /><BR /><A href="http://support.microsoft.com/kb/309283" target="_blank">http://support.microsoft.com/kb/309283</A><BR /><BR />Even the lowest "Web Edition" of Windows 2003 can support two processors (even if they are dual- or quad-core ones), so it looks like there won't be a rebuild for licensing reasons either.<BR /><BR />MK Wed, 29 Apr 2009 11:07:01 GMT https://community.hpe.com/t5/bladesystem-general/adding-a-processor-to-server/m-p/4410177#M5836 Matti_Kurkela 2009-04-29T11:07:01Z https://community.hpe.com/t5/bladesystem-general/adding-a-processor-to-server/m-p/4410178#M5837 In windows 2003 you don't need to do any additional operations when you add CPU<BR /><BR /> Wed, 29 Apr 2009 13:44:10 GMT https://community.hpe.com/t5/bladesystem-general/adding-a-processor-to-server/m-p/4410178#M5837 Igor Karasik 2009-04-29T13:44:10Z