Hi,
The difference is in what hardware is supported, not in Vista itself. To run
64-bit (x64), you must be using a system built with 64-bit hardware and
processor. This is a fairly new step in computer advances, many systems are
still 32-bit (x86). The 32-bit version can be used on an x64 system, but not
the reverse. x64 takes advantage of larger data paths and larger capacity
for memory management to greatly speed up the computing process. However,
one disadvantage is that not all hardware vendors supply drivers for their
equipment, whereas 32-bit drivers are very common, so one must take great
pains to ensure that the hardware they choose to build the system with is
fully supported and has drivers available from either the OS or the vendor.
--
Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP
Windows help -
www.rickrogers.org