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-   -   Determining CPU FSB (https://www.linuxquestions.org/questions/linux-hardware-18/determining-cpu-fsb-380719/)

blimbo 11-07-2005 06:13 AM

Determining CPU FSB
 
Hi everyone,

I was wondering if there's a way of detemining a CPU's FSB, without taking the box apart (I think it's stamped onto the top of the chip). I want to swap my work CPU and with my home one, but my home motherboard will only take upto 533mhz and I have a feeling this one is 800mhz.

I've tried cat /proc/cpuinfo which gives me the following, but it's not quite what I'm after.

Oh and I'm on FC4.

Cheers,
Tim

p.s. I've had a good look in the bios but it doesn't seem to say there either.

[root@localhost tim]# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 2
model name : Intel(R) Pentium(R) 4 CPU 3.00GHz
stepping : 9
cpu MHz : 2993.306
cache size : 512 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
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 cid xtpr
bogomips : 5990.91

RedShirt 11-07-2005 09:18 AM

Well, it isn't stamped on the chip, at least directly. Sometimes there is a number you can check with Intel or AMD and find out...

But why go that hard method?

There are numerous easy ways:

BIOS POST screen on boot will list the FSB, if it doesn't(which is rare),
you can go into the bios to check the FSB, though it could be set to auto.
Intel and AMD both release tools, as do a hundred other companies to find system information, but the only ones I know for sure are Windows.
So while I can't recommend them, google pulls up these options for linux:
Command line, built into kernel, processor information- http://acpi.sourceforge.net/document...processor.html
Intel's bootable version of the "Frequency Identification Utility"- http://support.intel.com/support/pro.../CS-007616.htm
Any of the linux Benchmark tools, including those included with your distro, if your distro didn't, just do a search on the web. They will all show you system info before you run tests.


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