I recommend to you that you install the 64 bits version to can able to use all available RAM memory in your system.
Regards

2011/7/29 Bob Goodwin <bobgoodwin@wildblue.net>

   This Dell DM4700 came with 2-256 mb strips, some time ago I added
   2-1 gb strips for a total of 2.5 gb.

   This morning I replaced the 256 mb strips with 2-2 gb for a total of
   6. The bios setup screen shows 6 gb but apparently Linux is only
   using half that amount, not much of an improvement!:

       [bobg@box6 ~]$ free -m
                     total       used       free     shared
       buffers     cached
       Mem:          3022        719       2303          0
       31        265
       -/+ buffers/cache:        422       2600
       Swap:         4575          0       4575

   This is an up to date F-15 32 bit configured as I want it.

   [bobg@box6 ~]$ uname -a
   Linux box6 2.6.38.8-35.fc15.i686 #1 SMP Wed Jul 6 14:46:26 UTC 2011
   i686 i686 i386 GNU/Linux

   Must I install the 64 bit version to take advantage of the memory?
   If so perhaps I could upgrade the present install to 64 and keep my
   configuration or do I have to bite the bullet and do a new install.

   Bob

   --


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Marcos Luis Ortíz Valmaseda
 Software Engineer (UCI)
 Linux User # 418229
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