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Hyper Threading Keep It On Or Off???

I

INYNN

Limp Gawd
Joined
Feb 27, 2004
Messages
298
I have a OC'd P4 2.8c @ 3.4Ghz I have Hyper Threading and im wondering should i turn HT on or off?? I have heard it slows down framerate, but i have heard its good for windows shit too. What should I do? Turn it on or off????

Thx
 
Hyperthreading is supposed to slow down single threaded applications SLIGHTLY but i doubt its by any amount you can ever notice. Hyprethreading gives a big boost in encodeing, rendering, multitasking, and anything that is multithreaded. Multithreaded in other words is anything that is coded to take advantage of dual processors. Hyperthreading in and of itself is a single processor and a logical processor working togethor. Granted the performance isn't as good as a dual processor but i've seen benches where a Pentium 4 with hyperthreading beats dual Opteron 240's in encodeing and rendering.

I doubt that it slows down frame rates very much having it enabled. The Pentium 4's do very well in gaming performance with hyperthreading enabled. Not quite as well as an A64 of course but better then an Athlon XP.
 
If your using Xp, Home or Pro, leave it on...it improves performance.


If your using another OS, turn it off.
 
Originally posted by djnes
If your using Xp, Home or Pro, leave it on...it improves performance.


If your using another OS, turn it off.
Click to expand...

Xp home only supports one CPU though. And hyperthreading makes the os think that there is 2 processors. So wouldn't it not be able to even "see" the ht?
 
xp home supports one physical cpu or two logical cpus (ie one hyperthreaded cpu like the P4C's)

xp pro supports two physical cpu or four logical cpus (ie two hyperthreaded cpus like dual xeons)

cleared up by a cheeze :(
 
Since my OS shows my computer as having two CPU's in Devise Manager and I am running Home version, wouldn't the software really enable the use of HT?
 
Originally posted by RonB
Since my OS shows my computer as having two CPU's in Devise Manager and I am running Home version, wouldn't the software really enable the use of HT?
Click to expand...

Yes... as posted above the Home version of XP supports HT enabled processors just fine.
 
Real simple solution.
Run your programs, benchmark, time, whatever you wish.
Disable HT, then benchmark, time, etc...
See what your results show.

If nothing else, multiple programs run faster with HT enabled.
 
Here are some benchmarks that show performance with and without Hyper Threading on the Northwoods and Prescott.

http://www.tomshardware.com/cpu/20040201/prescott-21.html

From those benchmarks it looks like you may lose 1 or 2 FPS in some games but the benefits of Hyper Threading greatly outweigh its negative attributes. Some games will perform the same or even slightly better with Hyper Threading enabled. It all depends.
 
good job of clearing it up cheeze! :)

leave it on unless you're benchmarking 3dMark2001.

It helps in every day stuff.... like having 20 windows of porn open, winamp playing, ripping music, etc. simultaneously.

Plus more and more applications will be (re)compiled for multi threaded use in the future.

So to sum it up.... leave it on.
 
Hyperthreading is the best thing since sliced bread.


Its the sole purpose I bought a P4C instead of a Athlon 64...
 
Originally posted by jacuzz1
Doom and Hl2 will be optimized for it
Click to expand...

As well as most new games, benchmarks, OS's, etc.
b/c HT & multi core CPU's are the way of the future.

I can see in the future... people bragging about how many cores they have not how many Ghz.... imagine 10 - 2Ghz cores on a single CPU, etc.
 
Originally posted by TekieB
Xp home only supports one CPU though. And hyperthreading makes the os think that there is 2 processors. So wouldn't it not be able to even "see" the ht?
Click to expand...

XP Home *will* see the virtual second processor (it is no different from XP Professional in that area)...so that dog doesn't hunt.

I, however, recommend XP Professional for other reasons.

Regardless of *which* version of XP you use, it is *always* better to HyperThread than not (and especially if you run Microsoft Office 2000 or later).
 
XP home sucks for other reasons. Such as the networking control panels and the fact that you can not mount the machine to a Domain when using it.
 
Originally posted by USMC2Hard4U
Hyperthreading is the best thing since sliced bread.


Its the sole purpose I bought a P4C instead of a Athlon 64...
Click to expand...

I second that, Lance Corporal. <removed joke about Marines and intelligence> --Senior Airman, Tx. Air National Guard
 
Originally posted by IdiotInCharge
I second that, Lance Corporal. <removed joke about Marines and intelligence> --Senior Airman, Tx. Air National Guard
Click to expand...

You just nailed why I recommend Pro over Home...*networking*.

Even though most home users don't run PDCs or BDCs at home, more and more home users share files, printers, and *especially* broadband connections (such as cable modems).

This is the area where Pro excels...and Home (and before that, 9x/ME-ouch) stinks to wastewater treatment plants.

"PGHammer recommends ONLY Windows XP Professional for home and business use"
 
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