256-bit computing

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In computer architecture, 256-bit integers, memory addresses, or other data units are those that are 256 bits (32 octets) wide. Also, 256-bit central processing unit (CPU) and arithmetic logic unit (ALU) architectures are those that are based on registers, address buses, or data buses of that size. There are currently no mainstream general-purpose processors built to operate on 256-bit integers or addresses, though a number of processors do operate on 256-bit data. A 256-bit quantity can store 2 different values. The range of integer values that can be stored in 256 bits depends on the integer representation used. The range of a signed 256-bit integer is from −57,​896,​044,​618,​658,​097,​711,​785,​492,​504,​343,​953,​926,​634,​992,​332,​820,​282,​019,​728,​792,​003,​956,​564,​819,​968 to 57,​896,​044,​618,​658,​097,​711,​785,​492,​504,​343,​953,​926,​634,​992,​332,​820,​282,​019,​728,​792,​003,​956,​564,​819,967. 256-bit processors could be used for addressing directly up to 2 bytes. Already 2 (for 128-bit addressing) would greatly exceed the total data stored on Earth as of 2018, which has been estimated to be around 33.3 ZBs (over 2 bytes). Xbox 360 was the first high-definition gaming console to utilize the ATI Technologies 256-bit GPU Xenos before the introduction of the current gaming consoles especially Nintendo Switch. Some buses on the newer System on a chip (e.g. Tegra developed by Nvidia) utilize 64-bit, 128-bit, 256-bit, or higher.