The more bits CPU can handle the faster computing will be processed. The data process will be handled in larger chunk and accessing physical memory more efficient and accurate. This is why modern CPU is shifting toward 64-bits and starting to leave 32-bits system.
32-bits Windows maximum limit for RAM is 4GB while 64-bit Windows can be 4GB to 192GB. It will be a waste to install more than 4GB on 32-bits Windows. Lets take an example two same CPUs but built on different base computing 32-bits and 64-bits, which one got faster performance? the answer is depend on what task they processed. For light task which is require less data to store on RAM, both 32-bits and 64-bits will show no difference in performance. But when processing heavy task such as video rendering, playing modern game that requires storing data more in RAM, 64-bits will come as the winner since the process will be handle in more efficient way than 32-bit system. 64-bits able to access larger data from physical memory since it is not limited to 4GB RAM. Unfortunately the difference architectures of both system will affect in software compatibility. Here is why 32-bits Windows is not able to run 64-bits based software and not vise versa, 64 bit windows is able to run 32-bits software without problem. Software developers today will likely shifting their app compatibility from 32-bits to 64-bits because of many benefits offered. If you still own 32-bits CPU, it is wise to upgrade to 64-bits system and update OS to 64 version.
Nir's Tech Team 