The main difference is (in)ability to use large amount of RAM.
32-bit systems use 32-bit pointers, and maximum value of unsigned 32-bit integer is 2^32, or 4Gb. In practice many 32-bit OSes are able to address only 2Gb of RAM. 64-bit pointers can address much more RAM (no hardware has reached 2^64 RAM limit yet). Nowadays even laptops may have 4 or 8 Gb of RAM, not to mention servers, which should have much more. So, 32-bit OS is a past day OS, for legacy hardware only. Unfortunately not everyone can afford a new hardware. My web server has 1 GB RAM and 32-bit processor :( Happily running OSol b134 :) Regards, Dmitry.
While we are talking about 32 | 64 bit processes; Which one is better? Faster? More efficient?
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