On Tue, Jan 15, 2013 at 6:52 PM, Richard C. Steffens <[email protected]>wrote:

> On 01/15/2013 05:40 PM, Matt McKenzie wrote:
> >
> > Maybe you have this in another post, but can you tell us exactly what
> model
> > CPU you have?
> > Output of /proc/cpuinfo would help also.
>
> /proc$ cat cpuinfo
> processor    : 0
> vendor_id    : GenuineIntel
> cpu family    : 15
> model        : 4
> model name    : Intel(R) Pentium(R) 4 CPU 2.80GHz
> stepping    : 9
> cpu MHz        : 2800.052
> cache size    : 1024 KB
> physical id    : 0
> siblings    : 2
> core id        : 0
> cpu cores    : 1
> apicid        : 0
> initial apicid    : 0
> fdiv_bug    : no
> hlt_bug        : no
> f00f_bug    : no
> coma_bug    : no
> fpu        : yes
> fpu_exception    : yes
> cpuid level    : 5
> wp        : yes
> flags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca
> cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm
> constant_tsc pebs bts pni dtes64 monitor ds_cpl cid cx16 xtpr
> bogomips    : 5600.10
> clflush size    : 64
> cache_alignment    : 128
> address sizes    : 36 bits physical, 48 bits virtual
> power management:
>
>
[snip]

So according to the [flags] section you do indeed have a 64bit CPU.
This reference is helpful.  The main thing to look for is the "lm" flag,
which AMD first called "long mode", for 64bit addressing.

http://unix.stackexchange.com/questions/43539/what-do-the-flags-in-proc-cpuinfo-mean


Also, according to Intel info, your CPU is a Pentium D, either Smithfield
or Pressler line, which came after Pentium 4 and before Core 2 series.

http://en.wikipedia.org/wiki/Pentium_D

So even though you only have 3GB RAM it might not hurt to jump into the
64bit pool now, get used to any quirks (probably not as many as when 64bit
first came to consumer desktops), so you can be prepared to take advantage
of it if/when you get more RAM.  And let's face it more RAM is always a
nice thing to have ;).


----------
Matt M.
LinuxKnight





> > Basically if your system is 64bit you would want to use the 64bit
> version,
> > but there could be gotchas if you have never used 64bit before.
> > If your system has 4GB or less of RAM the benefits of using the 64bit
> > version aren't as apparent (32bit OS can only use 4GB without
> modification).
>
> Alas, it has only 3GB right now. I'll probably upgrade it some day.
>
> > More or less any Intel CPU post Core 2 Duo (Conroe) era is 64bit.
> >
> > Most distros these days will have an x86 (32bit) and a 64bit version, the
> > second option from Ubuntu is for 64bit CPUs, either AMD or Intel.
>
> Thanks for the confirmation.
>
> --
> Regards,
>
> Dick Steffens
>
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