this post was submitted on 10 May 2024
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This is only true if you're still using a 32 bit cpu, which almost nobody is. 64 bit cpus can use up to 16 million TB of RAM.
Sorry I forgot to put my giant /s.
With PAE, a 32 bit CPU can also use more, but each process is still limited to 4GiB
Bank switching to "fake" the ability to access more address space was a big thing in the 80s...so it's technically possible to access addresses that are wider than the address bus by dividing it up into portions that it can see.