CPU speed consistently drops under load?? G73JH

I'm a little confused. I couldn't find this issue addressed anywhere.

When my G73JH is idling the CPU speed sits around 2700MHz, maybe going up and down a little. I check this using CPUZ and verified with Everest.

But when I start up a stress application like IntelBurn Test or Prime95 the CPU drops to 1728MHz and stays there, like a rock.

Now I'm not the most knowledgeable computer user in the world but shouldn't this be the other way around? I've been messing with this for several days now and the results are consistent.

My laptop is stock, no mods, latest BIOS, latest drivers and Turbo is turned to Normal in the BIOS.

Thank you.

 

You should read up on how turboboost works. It can't put all 4 cores to 2.8, but it can put one to 2.8. So if you've got load on all 4 ...

 

I see, so at idle one core is running at a higher speed but under load all four cores are running at a lower speed which results in greater speed.

Do I have that correct?

 

Depends on what's running. Imo CPU-Z isn't accurate at all for the i7 series... try throttlestop, this application uses the method which intel recommends for measureing the clock speeds... With throttlestop you can monitor the speed of all your threads easily and create accurate logs with a lot of information if you like.

 

That's great. I'll go get it immediately. Thank you.

 

This will give you an idea of how the boost works in chart form. The more cores you have active, the fewer "speed bins" are available for boosting. The boost is controlled by the number of active cores but also has additional limiters based on power draw and thermal load. The chart represents boost scenarios where the cooling is adequate and the core loading is optimal.

Intel® Core™ i7 Processor — Intel® Core™ i7 desktop proccessor Turbo Boost Technology Operation

These are desktop processors in the chart but the laptop processor's turbo technology works exactly the same way.

 

TY again.

Is there any type of tool that can monitor and display precisely what all four cores are doing, as far as speed goes, in some type of quick to reference moving graph?

I think if I could watch how the individual cores react in a visual representation under varying levels of stress I might be able to get a better understanding of it.

Maybe that's a ludicrous request, I honestly don't know.

 

Throttlestop will display you exactly the core speeds of each thread, as well as the multiplier of it and the temperatures.
There's no graph option but you'll get a lot of useful information anyway. I don't know of any other program which can do this. CPU-Z simply isn't accurate for the i7s.

Edit: As said, you can also make a log and take a more precise look at the data if needed.