Does a P4/Xeon w/ hyperthreading show as 2 CPUs?

[rwalterk]

If you turn on hyperthreading with a P4 or Xeon CPU, will the Windows task manager show it as 2 separate CPUs? We have a server here that was supposed to be dual-CPU but the task manager is showing 4 CPUs. Same with the system summary in computer management.

Thanks in advance,

Ray

 

[CraigRT]

yeh windows will show you the CPU as 2 different CPU's.

 

[FunkierThanU]

How do you 'turn on' hyperthreading?

 

[slatr]

To turn it on, go into your bios and enable it.

Some systems ship, for whatever reason, with it off.

 

[Keysplayr]

Believe it or not, on their PC order web form, Dell has the option for you to choose whether you want the PC shipped with HT enabled or not.
Keys

 

[slatr]

Any ideas on why you would want it off?

We got an HP workstation in at work with Dual Xeons and it was turned off... well for a minute it was anyway.

Stability, speed, ect.. all good.

It might generate a bit more heat under load, but its sure nothing to worry about.

 

[bjc112]

There really isn't a reason it should be disabled..

It offers advantages in multiple apps..

The only thing i can think about is if your have a high borderline overclock going..

( HT creates more heat )

 

[Ronin]

Which naturally means that the Dual Xeon box I just got shipped will show up as 4 CPUs (thx HT) :wine: