Well, the main difference in 32 and 64 bit operations is how the
computer deals with information
One of the biggest difference is the amount of ram it can
have.
32bit Windows 7 (Home premium) can only have up to 4gb ram,
while 64bit Windows 7 (Home premium) can have up to 16gb of
ram.
You may wonder why I put the brackets behind.
That's because Windows 7 64Bit (Professional) and above can have
max ram up to 192gb
The specifications needed to run both 32bit and 64bit Windows 7
are the same. Though one specific requirement would be the drivers.
32bit drivers wont work on the 64bit.
Another difference that you may notice would be the speed of the
Os. 64bit will generally run faster than 32bit.
Hope that helps you. :D