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Dual CPU without HT enough for streaming?

FireFox

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Hi Lads.

As many of you know i have a dual socket Machine with 2 x Xeon X5677 OC'ed 4.5GHz with HT disabled.

Since last week i have decided to stream while Gaming, so far as i know streaming takes advantage of HT but because i have 8 cores i would like to know if for streaming i need to enable HT or not.

Thanks in advance.
 

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I would just try it and watch Task Manager with H/T on and off.

While you are in BIOS reduce your clock speed if you are worried about temps with H/T enabled.
 

FireFox

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I would just try it and watch Task Manager with H/T on and off.
Last night i have watched it with HT off and the CPU usage was around 33%/36%
 

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Even with it off you wont get anywhere near 100% CPU

Try it.
 

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CAPSLOCKSTUCK

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Yes.......:)


Like i said in post #2........just try it and compare the graphs.
 
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HT will only help when you are running 9 or more threads at once. Turn it off.
 

FireFox

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HT will only help when you are running 9 or more threads at once. Turn it off.
It's off since first day i have OC''ed it:D

I just wanted to know if was necessary
 

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Sure if you're going to do 4x the work.
 

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So, you're turning HT off why again? The scheduler on Windows 7 is smart enough to know how to use logical threads, versus cores, versus CPUs on different sockets when the need arises. I personally wouldn't (and don't,) turn off HT just to get a higher overclock.
HT will only help when you are running 9 or more threads at once. Turn it off.
Yeah but given background tasks and threads sleeping that could get woken up at any time, it's not unreasonable that there are moments where more than 8 threads could be capable of running at any given time. Are they active for long before going back to sleep? No but, being able to schedule all of it can improve latency even if the CPU isn't fully loaded which is preferable to threads waiting to run.
 

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So, you're turning HT off why again? The scheduler on Windows 7 is smart enough to know how to use logical threads, versus cores, versus CPUs on different sockets when the need arises. I personally wouldn't (and don't,) turn off HT just to get a higher overclock.

Yeah but given background tasks and threads sleeping that could get woken up at any time, it's not unreasonable that there are moments where more than 8 threads could be capable of running at any given time. Are they active for long before going back to sleep? No but, being able to schedule all of it can improve latency even if the CPU isn't fully loaded which is preferable to threads waiting to run.
It's not about higher OC and i don't think any Game will take advantage of HT, and as i have said before with 8 cores i don't see the need to have HT on.
 

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It's not about higher OC and i don't think any Game will take advantage of HT, and as i have said before with 8 cores i don't see the need to have HT on.
You have two quad cores, not merely 8 cores. Latency to access another CPU's memory is rather high which makes context switching between physical CPUs more costly than a switch to cores or logical threads on the same socket. For that reason, having HT enabled will help make sure that tasks already running on one CPU stays there unless it absolutely must go to the other which will yield the best performance. Scheduling becomes a little more important to consider when talking about MP systems and schedulers are designed with that in mind. HT is bound to make a bigger impact on MP systems than SP systems for that reason.
 
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I streamed for years with an I5 2500K with no problem & I was using a 6950 1gig

You said you started streaming meaning past tense , im assuming it worked fine
 

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Let me reiterate that I'm not saying that HT will always improve performance. All I'm saying is that it's like having extra memory. You won't always use it but, you'll be glad you have it when you do.
 
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Let me reiterate that I'm not saying that HT will always improve performance. All I'm saying is that it's like having extra memory. You won't always use it but, you'll be glad you have it when you do.

Some OCers turn HT off since it reduces temp.
 
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Yeah but given background tasks and threads sleeping that could get woken up at any time, it's not unreasonable that there are moments where more than 8 threads could be capable of running at any given time. Are they active for long before going back to sleep? No but, being able to schedule all of it can improve latency even if the CPU isn't fully loaded which is preferable to threads waiting to run.

I agree with you, in regards to 4c/8t systems. But with HT off any demanding thread will never be slowed down by sharing resources within a core. Any background tasks will fight over the remaining cores which you have plenty of on a 8 core system.

Let me reiterate that I'm not saying that HT will always improve performance. All I'm saying is that it's like having extra memory. You won't always use it but, you'll be glad you have it when you do.

His 8 core monster already has enough multithreaded performance. For gaming he needs to maximize his single threaded efficiency.
 

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You said you started streaming meaning past tense , im assuming it worked fine
I am streaming, but i haven't done it today because i have some lags due to a wrong software configuration, i have to Google and see how to set it up.
 
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I agree with you, in regards to 4c/8t systems. But with HT off any demanding thread will never be slowed down by sharing resources within a core. Any background tasks will fight over the remaining cores which you have plenty of on a 8 core system.



His 8 core monster already has enough multithreaded performance. For gaming he needs to maximize his single threaded efficiency.


Sorry what? how is having HT enabled going to hinder single threaded efficiency exactly?
 
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Sorry what? how is having HT enabled going to hinder single threaded efficiency exactly?

Its a side effect of scheduling two threads on a single execution pipeline. Hyperthreading doesnt enable any extra execution hardware, it just takes advantage of idle units within the pipeline to increase throughput. Use google if you need more information on how hyperthreading works and how it effects gaming.
 
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There is a very minuscule deficit to single thread performance with HT enabled this is shown with my XEON processor.

However not enough to be a massive factor or really help with anything, i get much more benefits from having HT on with 8 threads available over just 4.
 
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Its a side effect of scheduling two threads on a single execution pipeline. Hyperthreading doesnt enable any extra execution hardware, it just takes advantage of idle units within the pipeline to increase throughput. Use google if you need more information on how hyperthreading works and how it effects gaming.

Oh ya, thanks for the tip bro, the good ol' "go google it cause I CBA justifying what I posted and you should prove me wrong not the other way around " response" ;)

There is a very minuscule deficit to single thread performance with HT enabled this is shown with my XEON processor.

However not enough to be a massive factor or really help with anything, i get much more benefits from having HT on with 8 threads available over just 4.

This is my point, unless you start maxing out cores and threads then there is little/none performance hit that is measurable and I agree, HT shows many more justifiable benefits than not having it enabled. I'd understand if OP said it was to get the max OC as having HT disabled can help squeeze that little bit extra OC headroom or reduce temps to allow an extra 100/200mhz etc etc
 
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Oh ya, thanks for the tip bro, the good ol' "go google it cause I CBA justifying what I posted and you should prove me wrong not the other way around " response" ;)

I seriously thought you didnt know how hyperthreading worked since your processor doesnt have it. Now I see you just wanted to argue ;)

HT shows many more justifiable benefits than not having it enabled

I agree if we are talking about a 4 core system. With 8 cores you will never get them all loaded while gaming so you never get any benefit with 16 cpu threads yet still get all the downsides of hyperthreading.
 
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I seriously thought you didnt know how hyperthreading worked since your processor doesnt have it. Now I see you just wanted to argue ;)



I agree if we are talking about a 4 core system. With 8 cores you will never get them all loaded while gaming so you never get any benefit with 16 cpu threads yet still get all the downsides of hyperthreading.


I prefer the available headroom thanks to that nice HT option.


Like playing some CPU intensive games that don't use all of the processor, freeing up extra threads to make high quality video instead.. and also maintaining the same FPS as it would without recording, but this also depends on your storage too.


As i said the benefit is so small it's not worth disabling, the only REAL benefit is heat reduction.
 
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I seriously thought you didnt know how hyperthreading worked since your processor doesnt have it. Now I see you just wanted to argue ;)

Ah no comeback so you use the old my epeen is bigger than yours and you must be a noob argument..... :roll:

I agree if we are talking about a 4 core system. With 8 cores you will never get them all loaded while gaming so you never get any benefit with 16 cpu threads yet still get all the downsides of hyperthreading.

And it's not just a gaming system, he's streaming as he mentioned in the OP, I am not arguing just wondering why you think his single threaded performance is going to suffer to the point that it would be more beneficial to turn off HT and you still haven't said why that would be :cool:
 
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lol alright you win
 
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