A question about RAM usage...

I owuld guess that if they are running seperatly on a 64bit os then they should still be able to use 3gb each the os can allocate it. There is a possiblty thatthe program can only read the first 32 bits, and will therefore have the 3GiB Seperated between them :D

I think is the OS that can only use up to 3Gbs of RAM not the software :p, my machine can only have a maximum of 3Gbs of RAM since its an 32bit OS.

The number of processors and the amount of physical RAM that are supported The following table compares the number of processors and the amount of physical RAM that are supported by the x64-based versions of Windows Server 2003 and by Windows XP Professional x64 Edition to those that are supported by the 32-bit versions.Collapse this tableExpand this tableOperating system Number of processors Physical RAM Microsoft Windows Server 2003, Standard Edition 4 4 gigabytes (GB) Microsoft Windows Server 2003, Standard x64 Edition 4 32 GB Microsoft Windows Server 2003, Enterprise Edition 8 64 GB Microsoft Windows Server 2003, Enterprise x64 Edition 8 1 terabyte
Microsoft Windows Server 2003, Datacenter Edition 32 128 GB Microsoft Windows Server 2003, Datacenter x64 Edition 64 1 terabyte Microsoft Windows XP Professional 2 4 GB Microsoft Windows XP Professional x64 Edition 2 128 GB

Memory allocation settings The following table compares the memory allocation settings that are supported by the x64-based versions of Windows Server 2003 and Windows XP Professional x64 Edition to those that are supported by the 32-bit versions. Collapse this tableExpand this tableMemory allocation settings 32-bit versions x64-based versions Total amount of virtual address space 4 GB 16 terabytes Amount of virtual address space per 32-bit process 2 GB (3 GB if the /3GB switch is added to the Boot.ini file) 2 GB (4 GB if the /LARGEADDRESSAWARE option is used) Amount of virtual address space for the 64-bit processes Not applicable 8 terabytes Amount of paged pool memory 470 megabytes (MB) 128 GB Amount of non-paged pool memory 256 MB 128 GB Size of system cache 1 GB 1 terabyte For more information about the x64-based versions of Windows Server 2003, visit the following Microsoft Web site: http://www.microsoft.com/windowsserver2003/64bit/default.mspx (http://www.microsoft.com/windowsserver2003/64bit/default.mspx) For more information about Windows XP Professional x64 Edition, visit the following Microsoft Web site: http://www.microsoft.com/windowsxp/64bit/default.mspx