Mavzu: х86 архитектураси ва унинг хусусиятлари (мисоллар билан тушунтирилсин) Variant №51 Kompyuterni tashkillashtirish fanidan

What is the difference between x86 and x64?

As you guys can already tell, the obvious difference will be the amount of bit of each operating system. x86 refers to a 32-bit CPU and operating system while x64 refers to a 64-bit CPU and operating system.

Does having more amount of bits in each operating system have any benefits?

Of course! This is one of the main reason the number of bits keep increasing over the years from 16-bits to 64-bits currently. As mentioned above, the bits are shorthand for a number which can only be 1 or 0. This causes the 32-bit CPUs not being able to use alot of RAM as 1 and 0, the total number of combinations is only 2^32 which equals to 4,294,967,295. This means the 32-bit processor has 4.29 billion memory locations each storing one byte of data which equates to approx. 4GB of memory which the 32-bit processor can access without workarounds in software to address more.

Today, 4GB is enough for basic tasks but if you wish to run multiple programs and other more heavy load tasks, 4GB is not sufficient. In addition, with a 64-bit system, it will be more efficient as it can process data in 64-bit chunks compared to 32-bit chunks. Your 64-bit system can also run 32-bit programs as they are backward compatible. But, it doesn’t work the other way where a 32-bit computer cannot run 64-bit programs.