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the main purpose is to read more than4 GB RAM that64bit provide
First advantage is64bit operating system will support32 bit/64 bit applications.
Second, Physical memory upgrade and support. Normally windows operating system limited to4GB in32 bit architecture.
64 bit architecture operating system have lot of advantages like instruction set, bios support, etc
In32 bit windows OS max RAM that the OS can access is limited to4GB
The64 bit OS can only be installed in computers with64 bit processors whereas32 bit can be installed in both.
4 GB RAM max in32 but , but unlimited in64bit
64 bit OSes take a little bit more space than their32-bit counterparts but offer larger memory addressibility advantage. moreover, x64 systems are able to process the data much faster since the processor is able to digest64-bit words. We (humans!) cant figure out the speed difference since our least count is one second. Those who are aware of overclocking softwares + benchmarking stuff must have understood that.
if we talk about32 bit OS it make package of32 bit and transfer it through buses and in64 bit the package of64 bit is transmitted through buses. Obviously the difference come at the time of loading programs and transmitting data.
32 bit OS Support max upto4 GB RAM The Main Differance, And64 Bit Support More then8GB RAM .
Overall it will Faster your speed and Applications, compare to32bit OS
64-bit OS handles large amounts of random access memory (RAM) more effectively than a32-bit OS.While32 bits of information can only access4 GB of RAM, a64-bit machine can access17.2 BILLION gigabytes of system memory. This also means that your video cards and other devices will not be stealing usable memory space from64 bit OS.
This in my opinion is the biggest advantage.