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Old 08-02-2007, 11:02 AM   #1
ahmed73
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How to check whether a m/c is 32 or 64 bit


Hi,

Iam trying to install SuSe Linux 10.0 on a P4 machine.
The first screen says that "About to install 32 bit OS on a 64 bit Computer". Does that mean my computer is of 64 bit architecture.

I already have RHEL WS5(32 bits)installed on this machine, can somebody tell me how can I find out whether this machine is 32 bit or 64 bit arch.

Thanks
ahmed
 
Old 08-02-2007, 12:16 PM   #2
macemoneta
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From WikiPedia:

Quote:
Intel subsequently began selling Intel 64-enabled Pentium 4s using the E0 revision of the Prescott core, being sold on the market as the Pentium 4, model F. However, the revision F core was targeted at workstations. Intel's official launch of Intel 64 (under the name EM64T at that time) in mainstream desktop processors was the N0 Stepping Prescott-2M. The E0 revision also adds eXecute Disable(XD) (Intel's name for the NX bit) support to Intel 64, and has been included in the current Xeon code-named Irwindale. All 9xx/8xx/6xx/5x6/5x1/3x6/3x1 series CPUs have Intel 64 enabled, as do the Core 2 CPUs, and as will all future Intel CPUs. Intel 64 is also present in the last members of the Celeron D line.
What is the output of:

Code:
cat /proc/cpuinfo
Update: The flag you are looking for is 'lm'.

Last edited by macemoneta; 08-02-2007 at 12:21 PM.
 
Old 08-03-2007, 03:09 AM   #3
ahmed73
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Hi macemoneta,

The out put of cat /proc/cpuinfo is,

processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Pentium(R) 4 CPU 2.66GHz
stepping : 1
cpu MHz : 2661.689
cache size : 1024 KB
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 mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm constant_tsc up pni monitor ds_cpl tm2 cid cx16 xtpr
bogomips : 5327.37
 
Old 08-03-2007, 11:39 AM   #4
macemoneta
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Quote:
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe lm constant_tsc up pni monitor ds_cpl tm2 cid cx16 xtpr
You have a x86_64 (64-bit) processor.
 
Old 08-09-2007, 11:22 AM   #5
ahmed73
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Hi macemoneta,

Thanks a lot for the information.

Thanks again
Ahmed
 
  


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