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Old 11-15-2006, 05:28 PM   #1
sammy11
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Question system monitor shows more CPUs


I am running FC5. Recently our IS department changed my motherboard due to NIC failure. Now the monitor shows 4 CPUs while there are only 2 in reality. It was normal before the motherboard change. In system monitor, all the four CPUs actually shows some percentage of usage when a big program runs. I haven't noticed any performance change yet. Anyone knows why this happens?
Thanks
 
Old 11-15-2006, 06:36 PM   #2
glussier
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Are P4s with ht enabled? If so, this is totally normal to see 4 cpus.
 
Old 11-15-2006, 07:28 PM   #3
sammy11
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Do you mean hyper thread? I checked the BIOS, it is enabled. The problem is, I only have two CPU on the board. Why the system monitor shows 4 working CPU?
The system is dell precision 470, dual Xeon 3.4 GHz.
Thanks,
 
Old 11-15-2006, 08:00 PM   #4
glussier
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Yes Hyperthreading, what you see on system monitor are 2 physical cpus + 2 logical cpus. That's what is hyperthreading.

Last edited by glussier; 11-15-2006 at 09:58 PM.
 
Old 11-15-2006, 08:26 PM   #5
sammy11
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cool! Thanks,
 
Old 11-16-2006, 10:20 AM   #6
poweredbydodge
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AMD's with hypertransport enabled will do the same thing.
 
Old 11-16-2006, 10:41 AM   #7
glussier
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Quote:
Originally Posted by poweredbydodge
AMD's with hypertransport enabled will do the same thing.

No it won't. Hypertransport has nothing to do with number of cpus or logical cpus.
 
  


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