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Does my laptop really have two CPUs?

post #1 of 5
10/6/04 at 4:05am
Thread Starter 
I am honestly not sure if my laptop has one or two CPUs, because when I ordered it it only said pentium 4, 3.40GHz Processor, but nothing about 2 CPUs.

but when I checked in DxDiag it says "...cpu 3.40GHz (2 CPUs)"

I know that this is probably a stupid question but I didn't even know if laptops could have 2 CPUs.
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post #2 of 5
10/6/04 at 4:27am
its hyperthreading, you can see them in device manager too. It doesnt mean you have 2 cpus, it means you have hyperthreading enabled, I think almost all the P4s support this.
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post #3 of 5
10/8/04 at 4:29pm
You can also see this in the task manager. Under the performance monitor it will show two graphs (like having 2 CPU's) indicating that HT is enabled and functioning.
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post #4 of 5
10/8/04 at 9:04pm
Nope..there's only one CPU...the P4 can "split itself in two" and act as two separate CPUs allowing multiple data threads at the same time.
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post #5 of 5
10/9/04 at 11:13pm
Hyperthreading is the abililty for a processor to handle two threads at once but on a single processor. Windows sees a hyperthreading CPU as two CPU's. Linux will compile for symetric multi processing (SMP). Basically you have one CPU but your OS sees it as two.
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