[CentOS] Silly question x64 vs i386

Scot P. Floess sfloess at nc.rr.com
Wed Dec 16 20:02:09 UTC 2009


Its a Dell Pentium D - basically x86_64 but does not support hardware 
virtualization.  Its a Dell Poweredge SC430 if that helps???

On Wed, 16 Dec 2009, John R Pierce wrote:

> Scot P. Floess wrote:
>> I have a really silly question... but just want to ask...
>>
>> I have one box on my home network that is x86_64 capable...  My other
>> boxes are all i386.  As this x86_64 machine can, at most, house 4 GB of
>> RAM (currently only has 1 GB) - is there any advantage to my running
>> x86_64 on that machine instead of i386...  Long story as to why I am
>> asking - but before I go off and moveit down to i386 - just wanted some
>> opinions :)
>>
>
> on most 64bit capable x86 CPUs, 64bit code is faster, because the x86_64
> mode has more registers than the traditional i386.   On the first gen
> Intel x86_64 CPUs, that would be P4's that had 64bit added to them, I'd
> probably stick with 32bit, but on any AMD or Intel Core CPU, I'd
> probably use x86_64 by default.
>
>
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Scot P. Floess
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