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Other benefits of 64-bit OS apart from memory expansion?

I'm going to be buying a laptop soon. I'm going to install Linux so that it will dual-boot Windows and Linux. If it is a 64 bit machine with 4 gigabytes of memory or less, would there be any downsides in installing a 32-bit copy of Linux instead of a 64-bit one?

If it's relevant, I will most likely be installing Xubuntu 12.04.

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marked as duplicate by Ignacio Vazquez-Abrams, Renan, Dennis, Randolph West, Mokubai Aug 3 '12 at 6:18

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

If you never upgrade the memory beyond that 4GB then the choice is mostly irrelevant.

I would go x64 because it is most future proof.

32 bit is useful if:

  • You are really low on memory (think 16MB or 32MB)
  • Your CPU only supports 32 bits.
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