So it seems hyperthreading technology especcially on certain intel pents, mine is a Intel pent 4 3.00 ghz processor (2 cpu) with windows xp, My comp was running slow not that slow still fast but not fast as it should be and it would make alot of noise and game preformance was pretty slow.
Well hyperthreading technology in bios enabled will conflict with alot of windows XP and processors i turned this off and my comp is running at blazing speed. Just a little heads up
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http://www.extremetech.com/article2/0,1697,701267,00.asp
quote
For many applications, Hyper-Threading is not a factor at all. One key example would be games. Most games are written as a single event loop, running in a single thread. Because of this, most games get no boost at all from Hyper-Threading. It's possible that tasks could be run in the background while playing a game, but most gamers would frown on anything that might rob precious frame rate
end quote
hyperhtreading will have no performace effect whatsoever, all you should be running with your game is your firewall, and perhaps a memory manager like Cacheman
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Yeah, I could understand it not being taken proper advantage of... Can anyone confirm that hyperthreading could actually be detrimental?
and things like photoshop/cad/design stuff could act weird.
I find it amazing that by 2020 first world countries will be competing to get immigrants.
This is pretty fascinating stuff. Apparently, part of the Pentium 4 architecture is a "replay system" which holds instructions dispatched by the scheduler prematurely (before all the resources needed are availible). This thing actually loops the instruction through the processor while waiting, and generally steps on the toes of the other thread trying to execute (even if it is largely CPU bound, using registers and L1 Cache). The Prescott Core P4's have a queue for those instructions to wait in now, but yeah the older P4's that first got Hyper Threading might be adversely affected.
There is a long X-bit labs article about the Replay feature, here is a page that deals with it as it relates to HT.
Replay Influence on Hyper-Threading
Would be good if someone could post framerates with and without HT enabled. Ideally with mulitiple MMOG's with varying degrees of graphical complexity.
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Except in some very rare occasions, Hyperthreading will only hurt performance if your system isnt set up properly. It definitely does not conflict with anything in Windows XP. It will only improve performance on games that are written for multiple processors or when multitasking, and most games dont fall into this category. (Games, like most applications do use multiple threads, however most threads end up waiting for other threads to finish and you still only have a single thread running at one time.)
All they are really demonstrating is the effect one poorly coded thread can have on another thread when the two are running at the same time. In fact the overall performance gain from Hyperthreading in their example was extremely good, they had on thread running at its full normal speed and a second running at about 90% of its full normal speed.
This greatly exceeds that 20%-30% performance increase you would normally expect to see on a 2-way symmetrical multi-threaded process running multiple independent threads. (Symentrical Multi-threading is the generic name for what Intel is calling Hyperthreading, which is Intels trademarked term for the technology)