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Hyperthreading - Enable Or Disable?

rlculver

rlculver

rlculver

Associate
Joined
30 Oct 2002
Posts
309
Hi,

Is it a good idea to enable Hyperthreading, or does this slow down games / applications?

I have a Intel Pentium 4 2.8 Ghz HT Processor.

Thanks

Robert
 
Hyperthreading is the Pentium 4's only saving grace, turn it on, your system will be much quicker, it acts as though there are two processers.
 
Yeh no reason why it should be disabled in win2k.....

used to run my dualcore without problems on win2k, so its nothing to do with how it handles multiple threads.....
 
thing about running it in 2k is that it treats the hyperthreading as a new CPU (as you have to run it as a multiproccessor computer) and this can cause it to run slower due to windows 2k sending the processor too many instructions. Even though intel and microsoft say to enable hyperthreading this way I still think that its not worth it

Stelly
 
Doesn't XP also treat it as a second cpu?

I can't see how this can be a problem to be honest. Certainly not seen anywhere else people with problems running P4s on win2k
 
nope... I have alwasy been told that its different with XP (dont know how) but with windows 2000 its suppose to have problems with... I'm just speak on my own experience on HTT in windows 2000

Stelly
 
PinkFloyd said:
Yeh no reason why it should be disabled in win2k.....

used to run my dualcore without problems on win2k, so its nothing to do with how it handles multiple threads.....
Click to expand...

Win2k sees the hyperthreaded CPU as a physical CPU rather than a logical one, hence in many cases performance is actually slower than if you were to just disable HT altogether.

Win2k just isn't optimized for hyperthreading unlike XP so you're better off disabling it.
 
mmj_uk said:
Win2k sees the hyperthreaded CPU as a physical CPU rather than a logical one, hence in many cases performance is actually slower than if you were to just disable HT altogether.

Win2k just isn't optimized for hyperthreading unlike XP so you're better off disabling it.
Click to expand...

thats what I meant, you just explain it better ;)

Stelly
 
BillytheImpaler said:
I've never seen it cause problems for me. In some database intensive hosting situations I've seen HT cause a performance hit but never in desktop work.
Click to expand...

I have to admit that its a small difference but it does... try running some benchmarks with and without

Stelly
 
Stelly said:
I have alwasy been told that its different with XP (dont know how)
Click to expand...
Basically XP knows the difference between a hyperthreading, dual-core and multi-processor and can act accordingly.

For a start, XP Home only supports a single physical processor but will support dual-core and hyperthreading.
 
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