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Message: <blockquote data-quote="Tom Riddle" data-source="post: 10199730" data-attributes="member: 47610"><img src="/styles/default/xenforo/smilies/default/no.gif"  class="smilie" loading="lazy" alt=":no:" title="No    :no:" data-shortname=":no:" /><img src="/styles/default/xenforo/smilies/default/no.gif"  class="smilie" loading="lazy" alt=":no:" title="No    :no:" data-shortname=":no:" /><img src="/styles/default/xenforo/smilies/default/no.gif"  class="smilie" loading="lazy" alt=":no:" title="No    :no:" data-shortname=":no:" />This is a very common misconception. What we call 32bit and 64 bit is NOT the width of the data bus. 64 bit data buses were available from the very earliest Pentium processors.What 64 bit refers to is the INTERNAL architecture of the CPU, in that a 64 bit CPU has 64 bit registers and 64 bit internal buses. A 64 bit CPU can process 64 bits at a time, unlike a 32 bit CPU. The advantage of performance is due to this fact, not because of increased data transfer to the processorIt follows that the internal Memory Address Register of a 32 bit CPU was 32 bit and could only hold around 4B of memory addresses (which is where the limitation comes from). A 64 bit processor also will be connected to a 64 bit Address bus so that all 2^64 memory locations can be addressed</blockquote>

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