On Fri, Jan 7, 2011 at 10:08 PM, Jon Elson <[email protected]> wrote:

> Movies are probably not going to benefit any.  The ONLY thing a 64-bit
> system does for you is it allows a SINGLE application to use more than 2
> GB of memory in one address space.  Huge SQL databases, huge CAD surface
> models and computational fluid dynamics are the places where you run
> into this.

Well, actually, 64-bit mode has a small but measurable speed
advantage, simply because the CPU has better architectural features
(more registers, new instructions, etc) in the 64-bit mode. The
speedup varies (and is sometimes negative) but people reported
benchmarks from 20% faster to 20% slower, depending on the task:

http://64-bit-computers.com/linux-ubuntu-610-64-bit-vs-32-bit-benchmark-test.html

At the same time, 64-bit architecture is still 'new' as far as
software is concerned: since the datatypes changed, we are through
another 'not all the world is a VAX' transition, with software bugs
and incompatibilities; e.g. AFAIK, Adobe still doesn't have a 64-bit
flash player. So, I agree that 32-bit is the safe choice.

This email is typed on a 32-bit Linux machine, but I am using a 64-bit
Linux at work.

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