Whoa...Intel Hyper-threading???

[Electric Amish]

Only works with Windows XP??

Is this correct?

 

[Grey]

I don't know what does Intels site say?

 

[LAUST]

yes

and windows 2003

I have a server with dual HT xeons with HT.. looks like quad in perfmon 😉

 

[Viper GTS]

It works fine in XP/2003 Server.

It can cause issues with Win2K because hyper threading wasn't around when 2K was released & the OS does not correctly utilize it.

Viper GTS

 

[Electric Amish]

Originally posted by: Viper GTS
It works fine in XP/2003 Server.

It can cause issues with Win2K because hyper threading wasn't around when 2K was released & the OS does not correctly utilize it.

Viper GTS

Interesting. I was just placing an order with Dell and the Account Manager emailed me back saying the Hyper-threading only worked with WinXP. I never realized that....

 

[FoBoT]

Originally posted by: Electric Amish

Originally posted by: Viper GTS
It works fine in XP/2003 Server.

It can cause issues with Win2K because hyper threading wasn't around when 2K was released & the OS does not correctly utilize it.

Viper GTS

Interesting. I was just placing an order with Dell and the Account Manager emailed me back saying the Hyper-threading only worked with WinXP. I never realized that....

so you wanted to buy the new box without XP ? you wanted W2K ? why?

 

[MaxDepth]

I did not know that either. Now I have to change an order for WinXP instead of Win2K for my sister's Christmas present.
I'm building her family a mini desktop computer.

 

[Electric Amish]

Originally posted by: FoBoT

Originally posted by: Electric Amish

Originally posted by: Viper GTS
It works fine in XP/2003 Server.

It can cause issues with Win2K because hyper threading wasn't around when 2K was released & the OS does not correctly utilize it.

Viper GTS

Interesting. I was just placing an order with Dell and the Account Manager emailed me back saying the Hyper-threading only worked with WinXP. I never realized that....

so you wanted to buy the new box without XP ? you wanted W2K ? why?

Actually I'll be putting NT4.0 on it, so it doesn't really matter. I just thought it was more of a hardware process and didn't realize it was tied into the OS that much.

 

[FoBoT]

Originally posted by: Electric Amish

Originally posted by: FoBoT

Originally posted by: Electric Amish

Originally posted by: Viper GTS
It works fine in XP/2003 Server.

It can cause issues with Win2K because hyper threading wasn't around when 2K was released & the OS does not correctly utilize it.

Viper GTS

Interesting. I was just placing an order with Dell and the Account Manager emailed me back saying the Hyper-threading only worked with WinXP. I never realized that....

so you wanted to buy the new box without XP ? you wanted W2K ? why?

Actually I'll be putting NT4.0 on it, so it doesn't really matter. I just thought it was more of a hardware process and didn't realize it was tied into the OS that much.

ahhh, i see

 

[Viper GTS]

More info

Viper GTS

 

[Maverick]

how well does hyper threading work any way? The specs made it seem like it'd make a 3 ghz work like a 6 ghz...whats the real world scalability like?

 

[Electrode]

It works in Linux too.

 

[JustAnAverageGuy]

Originally posted by: Shiva112
how well does hyper threading work any way? The specs made it seem like it'd make a 3 ghz work like a 6 ghz...whats the real world scalability like?

No, it doesn't work like that.

Just for examples sake, I'll make up some numbers to get a point across.

At any given moment only 10% of the CPU is being used. The rest of it is idle and does nothing. This is due to the way CPUs are designed.

Hyperthreading is a way to increase a CPUs usage by sending instructions to different parts of it. Turning that 10% into 20% of it being used.

Putting HT on a 500MHz P3 doesn't make it a 1GHz P3. It just makes it a 500MHz P3 that can do "twice" the work. By putting more of the actual processor to work.

That's about the extent of my recollection. Bearing in mind that I have little confidence that what I said was right.

 

[Gunbuster]

The problem is pre XP windows OS's see it as a hardware CPU so single apps send threads to both "CPUs" and this can sometimes slow the system down.