[Ubuntu-US-PA] 32 bit vs. k64 bit for Linux

SilverTip257 silvertip257 at gmail.com
Mon Apr 23 00:54:03 UTC 2012

Don't forget PAE (Physical Address Extension) kernels allow greater
than 4GB of RAM to be accessed on 32-bit systems ... with a slight
performance hit.

Windows has the 3.5GB of RAM limit - with the PAE kernel in use, Linux does not.

So we have 32-bit kernel without PAE and with PAE (access more memory)
for 32-bit systems.
And we have 64-bit kernel for 64-bit systems.

It is possible not all packages are either available for 64-bit or
there might be something that doesn't work properly.  It's a big
maybe, but it is possible to run 32-bit apps on a 64-bit system.

Support for devices and packages is best for 32-bit systems since it's
been around longer and the user base is larger.  The 64-bit user
base/support is becoming larger though.  I can't think of an
application or otherwise that I've heard isn't available for 64-bit

I don't see any reason why a 64-bit OS on a system with 2 to 3GB of
RAM would be slower than that same system running a 32-bit OS.  I've
never noticed that nor have I specifically tested it.  PAE performance
is another story though ^.

Probably best/a must to go with 64-bit if you've got more than 4GB of RAM.
Unless I'm missing something there isn't exactly a clear cut reason
not to run 64-bit anymore. ;)

//  SilverTip257  //

On Sun, Apr 22, 2012 at 19:59, Lee Sharp <leesharp at hal-pc.org> wrote:
> On 04/22/2012 05:51 PM, Charles E. LaMonte,n3vuo wrote:
>> Greetings to all, Which is better for Linux 32 bit or 6+ bit ? Thank you.
> Depends on the memory.  32bit tops out at 3.5 or so depending on your video
> card, but has less overhead.  64bit can take much more memory, but has
> slightly more overhead.  On on a 2 or 3 gig system, 32bit is faster.
>                        Lee
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