system monitor shows more CPUs

sammy11 · 11-15-2006, 04:28 PM

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

glussier · 11-15-2006, 05:36 PM

Are P4s with ht enabled? If so, this is totally normal to see 4 cpus.

sammy11 · 11-15-2006, 06:28 PM

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,

glussier · 11-15-2006, 07:00 PM

Yes Hyperthreading, what you see on system monitor are 2 physical cpus + 2 logical cpus. That's what is hyperthreading.

sammy11 · 11-15-2006, 07:26 PM

cool! Thanks,

poweredbydodge · 11-16-2006, 09:20 AM

AMD's with hypertransport enabled will do the same thing.

glussier · 11-16-2006, 09:41 AM

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.