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Win2K Pro and Hyper-Threading

A

Aztlan

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Aug 3, 2002
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ok, i just bought an intel system (well i build it) and now people are telling me that windows 2000 pro doesnt support HT (ha didnt researched that part)

i am running now win2k with the following system

Asus P4P800 motherboard
Pentium 4 2.4C OC @ 3.2 ghz
Sapphire 9800 pro
Creative Audigy 2 Sound Card
512 MB kingston HyperX memory (soon will buy another stick)
Western Digital 74 gb Raptor Drive
Lite ON dvd reader/cdrw combo Drive
Antec 480 Watt True Power Supply

and is running stable

i see two cpu's in windows 2k

can someone clarify this thing (sorry i have been out of the pc hardware news in a long time)

by the way i have SP4
Thanks
 
2k Pro doesn't support HT.
However, you don't need HT support to take advantage of it. Any SMP capable OS will schedual two threads (2k Pro is of course dual CPU capable).
It will treat it as though you had two physical cpus, which might not be ideal for HT, but it will work fine.
 
oh ok,
my system runs ok, when using applications or games
but is there a perfomance drop because win2k doesnt support HT
just wondering
 
Yeah, I have been wondering about this as well... Any info would be much appreciated.
 
I remember reading that there were some performance issues with HT in Win 2000. As far as multitasking is concerned, you should reap full benefits from it. For example, I run a HT box with Win 2000 installed for F@H. I have two seperate instances (copies) of the program running simultaneously. It works just as well as my HT Win XP machine. Within a single application that supports HT however, it's not the same. You should upgrade to Win Xp to get all the benefits.
 
Just to add some more anecdotal experiences to this thread, I have a P4 2.4C PC with 512MB (2x256MB), Radeon 9500np softmod -> 9700np, and Win2K SP4. With HT turned on, I get around 12,200 on 3Dmark01. With HT turned off in the BIOS (P4P800 Deluxe), I get around 13,800 on 3Dmark01. Is this because of how the 3Dmark01 tests are configured, or is this related to HT and Win2K?
 
Originally posted by Aztlan
...512 MB kingston HyperX memory (soon will buy another stick)...
Click to expand...
Doesn't HT require dual memory sticks?
 
the problem with running hyperthreading on a non hyperthreading os is that it is treated like two physical os's. the Idea behind hyperthreading is that the logical processor picks up the ALUs the physical one drops. that way they don't idle for 20 clocks until the pipe completes, the problem is, that if there is nothing using the logical cpu but it is still running, the overhead of running it hurts performace, now on xp (a ht aware os), the logical proc is stopped when it isn't being used, maximizing performance, in non ht aware OS's, it is always running, taking a bite out of performance.
 
I know. Why can't MS patch this with a service pack? This pisses me off. I actually paid for my OS's. 1 win2k and 2 XP's. I am pretty much convinced that if they wanted too they could patch it. I have heard of hacks also getting it too work but have not found them yet.

I hate using winXP. I don't care what anyone says it is not as stable as win2k. I am talking about the weird little quirky things it does. I hate that crap.
 
IF they patched it, fewer people would upgrade and BUY XP. Marketing at it's finest.
 
Originally posted by WuzFast
IF they patched it, fewer people would upgrade and BUY XP. Marketing at it's finest.
Click to expand...

I know but I hate XP. I have been changing some of my hardware around on my rigs and boom all of a sudden I have to activate them all. Simply moving a HD and vid card around causes this.

Hopefully if I ever goto a64 I can use win2k again. I know win2k works for multi tasking with HT but I really notice a super pi decrease in win2k w/HT on.
 
So basically, the consensus is that HT doesn't work as well in 2000 as it does in XP?
 
Originally posted by sc4r4b
So basically, the consensus is that HT doesn't work as well in 2000 as it does in XP?
Click to expand...
Doesn't work as well? Probably the better answer is doesn't work at all.

I read (once again) the P4P800 deluxe manual that comes with the MB. There is a section there that states if you aren't using WinXP or LINUX (specific version escapes me) you should turn off HT in the BIOS.
 
if you read the microsoft article about operating system level of support for a hyperthreading cpu. you then would understand that windows xp is a better operating system than 2000. although windows 2000 is good it is not the best and neither are the many other operating systems out today. but if i was to chose one over the other just from my knowledge of api, support, and capablility it would be xp.

even if you like it or not there is a technical superiority to windows xp over windows 2000.
 
Some people may not have the cash for an upgrade to XP... Especially, when 2000 works well. :rolleyes:
 
Ok, i have both. I want to run dual boot options. Isn't there a way to install win2k so that it treats the HT enabled cpu as a single processor?
 
sc4r4b, that is perfectly fine. i wouldnt even recommend going out and spending more money on something that is fulfilling the purpose already. total cost of ownership is a very logical argument and nothing wrong with it. but when people make excuses that are not logical then they are wrong in the very thinking.

oozish, you would be penalized with hyperthreading on and using windows 2000. personally, i wouldnt dual boot at all. i am sure that you have areason for it or else you woudl not be doing it. technically you would have to change only hyperthreading option when booting to windwos 2000. i would leave all acpi/apic options enabled.
 
So does both versions of XP support HT. I mean does XP Home and Pro both support it. I would be using XP home.
 
yes xphome has support for one physical cpu and one logical one
xp pro is only needed for smp systems with 2 physical cpus
 
well the topic at hand was cpu counts, and i addressed the two physical cpu problem in my post
 
merlin, you were right on the money. didnt say you were. just complementing (not complimenting) the information you have given.
 
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