how long turbo boost stay

Hi

Can anyone of sager clevo notebooks owners tell me how long the
core i7 2630 & core i7 2720 turbo boost stay in average ?

I Know that for example the core i7 2720 Four Cores Can turbo boot up to 3.0 GHZ but i don't know how long it will stay like this in average

 

I believe it'll run 3.0GHz (for 2720) when it requires that much power.

I don't think you can talk about something like this in terms of "average time of turbo boost." The CPU will run at X.XXGHz for whichever software it requires to process.

So lets say you are running SC2, which is CPU heavy game, if the CPU requires all four cores to process particle effects and what not, it'll OC when necessary.

I could be wrong, but I believe that's how it works at least...

 

Correct. I know you can disable the power saving feature in desktops, so it's on "turbo boost" all the time, if you don't have an overclocking model cpu.

 

i believe vaio97 is right, it will boost when you use a cpu intensive program and it should stay at the higher clock rate until you exit out.

 

Or it gets too hot/takes too much power

 

Turbo Boost only works when your program cannot use all 4 cores. IE: If your program is only single threaded and only uses one core, then Turbo Boost takes power from the other cores to boost that one thread to 3.0GHz, etc.

 

Sure it does. But you can also "TB" a 4C processor (2720 and above), and all of the cores. Check the link below, it stats the power at different "TB" core values.

AnandTech - Intel?s Sandy Bridge i7-2820QM: Upheaval in the Mobile Landscape


For instance, a 2720, can be "turbo boosted" on all 4C. It says the max QC (4C) frequency is 3.0ghz. 3.2ghz for DC and 3.3ghz for SC.

 

I think that's because the 2720 has 4 physical cores but operates as an eight-threaded processor.

 

2630, 2635, 2720, 2820 and 2920 all are 4C/8T cpu's.

 

The turbo boost can work as longest it is needed and the processor isn't overheating. I know there are charts to show how this works on each processor and the factor per core. There is a wikipedia listing. I am on my phone so maybe someone can post a link. I also tested this on my 2720 the other day and with StarCraft 2 all 4 cores ran at 3 ghz while I played and it stayed.

 

Could it quite possibly be the link I posted above? Sounds like it, and was the only thing I could find..

 

When Turbo Boost overclocks the cores the temperature rises. It keeps the higher clocks while temperature is acceptable. Then it reduces the clocks. I don't know for sure what exactly triggers turbo boost off, but the time it keeps on will vary from processors and notebook models...

It is a hard thing to estimate, I think, but it would be interesting to compare turbo boost autonomy with different quad core processors in the same notebook model. It may show up that a less powerful processor could end up with higher overall processing capability...

 

If I'm not mistaken, TB "activates" upon a certain percentage of cpu usage. For instance, if the cpu usage is over 65%, TB might activate, until the usage drops back below 65% or whatever the value Intel has designated.

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How is a less powerful cpu going to have more processing capability than one with more power?

 

In the end, it's all heat/power related. Most people will find that their 2720qm will generally sit around 2.5ghz all the time, no problem. It can go higher, but you quickly run into heat issues which will cause it to down-clock. This is true for all of the turbo models. People with lower ambient temps will notice that it stays at higher speeds longer than those with higher ambient temps.

This thread has a decent amount of real world user feedback with stress testing:

http://forum.notebookreview.com/sag...s-cpu-temperature-clock-speed-comparison.html


The single threaded max turbo is rare because there just aren't many single threaded applications out there.