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In computer architecture, 64-bit integers, memory addresses, or other data units [a] are those that are 64 bits wide. Also, 64-bit central processing units (CPU) and arithmetic logic units (ALU) are those that are based on processor registers, address buses, or data buses of that size. A computer that uses such a processor is a 64-bit computer.
The 32-bit/64-bit era is most noted for the rise of fully 3D polygon games. While there were games prior that had used three-dimensional polygon environments, such as Virtua Racing and Virtua Fighter in the arcades and Star Fox on the Super NES, it was in this era that many game designers began to move traditionally 2D and pseudo-3D genres into 3D on video game consoles.
A 32-bit register can store 2 32 different values. The range of integer values that can be stored in 32 bits depends on the integer representation used. With the two most common representations, the range is 0 through 4,294,967,295 (2 32 − 1) for representation as an binary number, and −2,147,483,648 (−2 31) through 2,147,483,647 (2 31 − 1) for representation as two's complement.
The great leap toward 64-bit computing and the maintenance of backward compatibility with 32-bit and 16-bit software enabled the x86 architecture to become an extremely flexible platform today, with x86 chips being utilized from small low-power systems (for example, Intel Quark and Intel Atom) to fast gaming desktop computers (for example ...
32-bit powerpc a released port since potato [21] 64-bit big-endian ppc64 [22] in mostly stalled development; 64-bit little-endian ppc64le a released port since jessie; Fedora; Gentoo Linux, with 32-bit ppc releases and 64-bit ppc64 releases [23] MintPPC, support for Old World and New World 32/64-bit Macs based on Linux Mint LXDE and Debian [24]
AMD64 (also variously referred to by AMD in their literature and documentation as “AMD 64-bit Technology” and “AMD x86-64 Architecture”) was created as an alternative to the radically different IA-64 architecture designed by Intel and Hewlett-Packard, which was backward-incompatible with IA-32, the 32-bit version of the x86 architecture.