what is difference between win 7 32 bit & 64 bit?
The biggest difference between 32-bit and 64-bit Windows 7, and one of the reasons why 64-bit operating systems even exist, is the increased amount of memory that can be addressed. 32-bit Windows 7 can only utilize a maximum of 4GB of memory. In contrast, 64-bit Windows 7 can manage up to 192GB of memory.