One of the greatest advantages of using a 64-bit version of Windows is the ability to access physical memory (RAM) that is above the 4-gigabyte (GB) range. This physical memory is not addressable by 32-bit versions .
Depending on the version of Windows that is installed, a 64-bit version of Windows supports from 1 GB of RAM to more than 128 GB of RAM. The ability to address more physical memory lets Windows minimize the time that is required to swap processes in and out of physical memory. Therefore, Windows can manage processes more efficiently. This memory management feature helps improve the overall performance of Windows .
Advantages when you install a 64-bit version of Windows
What to consider when you install a 64-bit version of Windows
I hope that answers your questions Nikhil.