Re: 32 bits
When 16 bits became the norm in the MS-DOS days, even Bill Gates said we would never need more than 640K of memory. I remember those days (yes... I'm a geezer)
Then when 32 bits became popular with the 386 and higher, we could then access 4 GB of memory. Back then, that was a LOT... never imagined we'd max that out, especially since virtual memory could be even bigger on these chips. Now we're buying machines with at least 8 GB, and more often, 16 GB RAM standard, and high-end machines with 32GB or more. I remember when hard drives were measured in tens of megabytes. LOL.
Now we're in 64 bits and have plenty of address space for any amount of RAM we're likely to have now, but for how long? Even though each bit doubles the address space, and the numbers are increasing exponentially, we may end up getting into the exabyte RAM territory in another 20 years. And we'll be asking when 64-bit will die as we install 128-bit Ubuntu 40.04 LTS. LOL.
There's additional benefits to "more bits" besides memory size... data size. 64 bit CPUs can process 8 bytes at once, and assuming the data bus is 64 bits, can write 8 bytes to and from RAM at once. It can do integer math up to 2^64 without additional instructions. 128 bits will increase that even more (16 bytes at once).
Last edited by kpatz; June 16th, 2019 at 05:54 PM.
Current 'buntu systems: multiple systems running Server or Desktop 22.04 LTS / Retired or Upgraded: 18.04.2 LTS, Mythbuntu 16.04 LTS, Ubuntu 16.04.1 LTS, 14.04 LTS, 10.04 LTS, 8.04 LTS
Been using ubuntu since 6.04 (16 years!)
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