[mythtv-users] i386 vs x86_64 Fedora

[Sarah Katherine Hayes]

Mike Holden wrote:
> Brad DerManouelian wrote:
>   
>> On May 14, 2008, at 8:08 PM, dcw wrote:
>>
>>     
>>> I am in the process of getting the components for a new computer for
>>> Mythtv.
>>> On a x86_64 computer is there an significant advantage of using a
>>> x86_64
>>> version of Fedora over a i386 version of Fedora?
>>>       
>> I would say not. I have two AMD 64 boxes. One runs i386 (my production
>> box) and one runs x86_64 (dev) and I actually prefer i386 because it's
>> easier to get stuff like Flash and StepMania running on i386. Myth
>> doesn't get any benefit from running x86_64 that I have ever noticed.
>>     
>
> What about for a more general-purpose box that will be doing myth plus
> some other stuff?
>
> One obvious area would be addressable memory, which is limited to a little
> over 2 gig by 32bit O/S.
>   
If the machine is being used for transcoding going x86_64 might give you 
a minor speed boost.  Going from i386 to x86_64 won't give a 50% 
increase in performance... works out around 25% depending on what the 
app is doing, how it's been written and such.

Personally having run the same Semperon in i386 and x86_64, it 
definitely feels snappier and more capable in 64bit mode; but that could 
be due to going from Ubuntu to Gentoo.