[sf-lug] 32bit VS 64bit

Ernest de Leon dryicezero at gmail.com
Thu Oct 18 09:59:40 PDT 2007

You will be missing out on the use of some of the RAM.  Run 'top' from the
terminal to see how much RAM you system 'sees.'  This will show you that you
are not using all 4096 MB of RAM.  The reason is that the 32 bit address
space is not wide enough to address all of the RAM.  In addition, every
device on the PCI bus takes more addressing space away from that.
Realistically, most people with 4GB of RAM in a 32 bit OS only see 3.25 to
3.5 GB of usable RAM.


On 18 Oct 2007 12:54:19 -0400, Blake Haggerty <Blake.Haggerty at sapphire.com>
> I have exactly 4gbs of ram..  Am I missing out on performance because of
> running 32bit?
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