The 64-bit configuration upgrade is a need for more memory for applications such as a large database or ERP programs with at least 100s of the same users where the 2 GB limit will be exceeded as soon as the apps are stored for better performance. This is especially true for Windows OS where the full and long value is 32 bit (they have a new _int64 variable. Only 64 bit indicators. In fact WOW64 is best done on Windows x64 so the 32 bit programs can use a lower fine on -64 bit Windows My experience in Windows x64 is a 32 bit application version that runs 10-15% faster than 64 bit because in the previous case at least for information about usage you can use the arithmatic pointer to save ib-tree (part very large processor data processors) Compuatation applications that require large decimals with double the accuracy of 32-64 bit operating system. These programs can use traditional _int64 instead of software emissions. simply because the ability to use memory e great for maintaining questionnaires and so on.