Windows7 Ultimate system 64-bit and 32-bit four differences

The difference is that the configuration requirements are different
64-bit operating system can only be installed on 64-bit computers (CPU must be 64-bit), and you need to install 64-bit common software to play 64-bit (x64) For best performance, a 32-bit operating system can be installed on a 32-bit or 64-bit computer.
Tip: 64-bit operating system and 32-bit operating system can coexist, can be installed by dual system, but need to pay attention to 4G or more memory on a 32-bit system can only recognize up to 4GB, so if it is a large memory installed Users are still the preferred 64-bit system, after all, the latter will be more advanced.
The difference is two, the architecture is different
The change from 32-bit to 64-bit architecture is a fundamental change, because most operating systems must be comprehensively modified to achieve the advantages of the new architecture. Other software must also be ported to use new features, and older software can generally be supported by hardware compatibility mode (new processors support older 32-bit version instruction sets) or software emulation.
Or directly implement a 32-bit processor core in a 64-bit processor, support 64-bit architecture operating system, and generally support both 32-bit and 64-bit applications.
The difference between the three, the ability to process data
32-bit system computer CPU can handle up to 32-bit data at a time, for example, its EAX register is 32-bit, of course, 32-bit computers can usually handle 16-bit and 8-bit Data, 64 is a computer that processes data much more than 32 bits at a time, running 64-bit data at a time.
The difference is four, the supported memory is different (addressing ability is different)
32-bit system supports 4G memory, while 64-bit can support hundreds of G memory;