The difference between 32-bit and 64-bit.
In: Technology
32 bit is 2^(32) and 64 bit is 2^(64) it refers to the amount that can be ‘addressed’ at any given time. 8 bit is 2^(8) and an 8 bit address has 256 values from 0-255 which is why Pac-Man for example crashes after level 255 it can’t handle another level.
32-bit has an upper level of about 4bn which is why 32-bit computers can only handle a maximum of 4GB of RAM. All systems have multiple routes/connections with different addressing capabilities, the Atari Jaguar being the most infamous, as it had a 32-bit CPU and a 64-bit memory bus and as such was marketed as a 64-bit system.
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