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post #11 of 29
higher PLL is a no no on 32nm especially btw. one of the easiest way to kill your chip is PLL not vcore or VTT.

LOWER PLL usually gets a little higher clocks for me at least, and quite a few other benchers as well.
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post #12 of 29
Thread Starter 
Quote:
Originally Posted by wumpus View Post
higher PLL is a no no on 32nm especially btw. one of the easiest way to kill your chip is PLL not vcore or VTT.

LOWER PLL usually gets a little higher clocks for me at least, and quite a few other benchers as well.
Ill pull it down a little and see what happens.
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post #13 of 29
I can hit 4.5 with my 980x with ht enabled, but I also have a great cooling loop. I've always left the pll on auto and its totally stable on my rampage iii extreme. I have also tried different ratios and ive found that a higher ratio with a lower fsb requires less voltage with no loss in performance. With those voltages you should be able to use ht without a problem unless youre on air.
    
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post #14 of 29
Quote:
I run mainly 3d apps and have no need to run 12 threads when I only have 6 cores. If I wanted 12 cores I would have bought 2 proccessors each with 6 cores.
Article : On the 3D content creation part, CineBench 10 registered a neat boost of about 17% when HT is enabled. Overall, HT is good for numerous applications out there that are multi-threaded but we aren't seeing any benefits for the latest games out there now.

The only negative effects they posted were on games not rendering or other applications.

Other article: Contemporary video codecs in Core i7 platforms run remarkably fast. It is obviously due to Hyper-Threading technology that allows the CPU to process 8 threads at the same time.

Although Adobe Photoshop is not one of those applications that can load any number of processor cores (physical and virtual) equally efficiently, the advantage of Core i7 processors is beyond doubt here, too. We see the same thing in another graphics editor – Paint.Net.

The third part, "Rendering" was the only expection:

We have no complaints about Core i7 performance during work in different 3D modeling applications. However, when we got to AutoCAD engineering suite, AMD Phenom II X4 955 suddenly outperformed all Intel solutions. Even the frequency increase didn’t help Core i7 family to win the leadership in this test.

I'm no expert, but everything I've ever read or seen has shown the advantages of HTing in certain applications, especially rendering, editing, and 3D applications.

Looking for more input on this.
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post #15 of 29
Quote:
Originally Posted by tconroy135 View Post
Ill pull it down a little and see what happens.
Yes a lower PLL is a good idea. Raising PLL above 1.8 is generally a bad idea for overclocks. 1.6 or 1.7 is usually a good idea. I know its fairly common for a lower PLL to actually help stability. So a 1.87 PLL is generally a bad idea.


Quote:
Originally Posted by Lampen View Post
Article : On the 3D content creation part, CineBench 10 registered a neat boost of about 17% when HT is enabled. Overall, HT is good for numerous applications out there that are multi-threaded but we aren't seeing any benefits for the latest games out there now.

The only negative effects they posted were on games not rendering or other applications.

Other article: Contemporary video codecs in Core i7 platforms run remarkably fast. It is obviously due to Hyper-Threading technology that allows the CPU to process 8 threads at the same time.

Although Adobe Photoshop is not one of those applications that can load any number of processor cores (physical and virtual) equally efficiently, the advantage of Core i7 processors is beyond doubt here, too. We see the same thing in another graphics editor – Paint.Net.

The third part, "Rendering" was the only expection:

We have no complaints about Core i7 performance during work in different 3D modeling applications. However, when we got to AutoCAD engineering suite, AMD Phenom II X4 955 suddenly outperformed all Intel solutions. Even the frequency increase didn’t help Core i7 family to win the leadership in this test.

I'm no expert, but everything I've ever read or seen has shown the advantages of HTing in certain applications, especially rendering, editing, and 3D applications.

Looking for more input on this.
Yes, in almost all reviews I have seen HT will see a general performance gain in most applications while lacking any performance difference in gaming. In almost every CPU intensive application that can use that many threads, HT will grant a decent performance boost.

I have heard that in applications that can utilize the extra threads, that a logical core will give the same performance as about one third of a physical core.
Edited by Airolden - 12/30/10 at 6:49pm
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post #16 of 29
Thread Starter 
Quote:
Yes, in almost all reviews I have seen HT will see a general performance gain in most applications while lacking any performance difference in gaming. In almost every CPU intensive application that can use that many threads, HT will grant a decent performance boost.

I have heard that in applications that can utilize the extra threads, that a logical core will give the same performance as about one third of a physical core.
The point is I am running at about 55c on load and I don't use applications that would require me to run HT and bump up the Heat.

If an application is designed with HT in mind it can help, of course, however the Efficency is not high enough to be worth the heat.

Like I said if I wanted 12 threads or 16 for that matter I would create a machine with that many cores.

P.S. PLL ~ 1.69 and looks good, Ill give it a day or so to ensure stability.

Anyone else notice a big V drop with the 980 I am showing about .05v less in windows than I have set in bios.
Edited by tconroy135 - 12/30/10 at 6:55pm
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post #17 of 29
Quote:
Originally Posted by tconroy135 View Post
The point is I am running at about 55c on load and I don't use applications that would require me to run HT and bump up the Heat.

If an application is designed with HT in mind it can help, of course, however the Efficency is not high enough to be worth the heat.

P.S. PLL ~ 1.69 and looks good, Ill give it a day or so to ensure stability.

Like I said if I wanted 12 threads or 16 for that matter I would create a machine with that many cores.
Alright so you're not using HT because you don't want the extra heat and you don't need it even though you've listed 3D apps as your main purpose for the system. What apps exactly are you using that can't benefit from the extra threads?
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post #18 of 29
Thread Starter 
Mostly 3d modeling.

However what I use I know for a fact has no benefit from HT because it did not benefit my 920.

I was considering buying a 975 originally, but as they are the same price or more than the 980, I went with the 980
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post #19 of 29
Quote:
Originally Posted by tconroy135 View Post
Mostly 3d modeling.
Actual program names if possible plz
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post #20 of 29
Quote:
Originally Posted by tconroy135 View Post
The point is I am running at about 55c on load and I don't use applications that would require me to run HT and bump up the Heat.

If an application is designed with HT in mind it can help, of course, however the Efficency is not high enough to be worth the heat.

Like I said if I wanted 12 threads or 16 for that matter I would create a machine with that many cores.

P.S. PLL ~ 1.69 and looks good, Ill give it a day or so to ensure stability.

Anyone else notice a big V drop with the 980 I am showing about .05v less in windows than I have set in bios.
55C is plenty low. What is the difference between 55 and say 75? Will it hurt performance? No. Will it decrease the life of your CPU? No, not really. A CPU is intended to withstand heat up to 90-100 degrees Celsius. 75 degrees won't cause any more degradation than 55 degrees.

Obviously my example is a little extreme, with HT enabled you may need to bump up the VCore a tiny bit and you'll gain 5 degrees max. Temperature is very over stressed, especially on this forum.

That being said, I am in no way telling you how to use your CPU. If you don't want to use HT then don't use HT. I would personally suggest you see what kind of performance difference you see with and without HT using the applications you use most commonly. Different applications handle multiple threads differently. Try it for yourself, you may be surprised.
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