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    ThrottleStop 5.00 and NP700 Z5C S02UB

    Discussion in 'Samsung' started by danimischiu, May 29, 2013.

  1. danimischiu

    danimischiu Notebook Enthusiast

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    Does anyone use this software for their laptop to deal with throttling:>?
     
    danimischiu, May 29, 2013
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  2. Dannemand

    Dannemand Decidedly Moderate Super Moderator

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    It doesn't look like you're getting much traction here. I think you will have much better chance of getting a response in the NP700Z5E Owners Lounge thread where I saw you already participated in discussions about throttling. Or even the 2013 Series 7 Owners Lounge.

    These Owners Lounge threads almost become forums in themselves, and many members watch and subscribe to them and do not pay much attention to other threads.

    A Google search for site:notebookreview.com/samsung throttlestop also revealed some hits in this thread. I don't know if they are relevant to you, I didn't dig that deep.
     
    Dannemand, May 30, 2013
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  3. unclewebb

    unclewebb ThrottleStop Author

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    danimischiu did a lot of testing for me on the Tech|Inferno forums and we were able to figure out why his Chronos 7 is throttling.

    Intel sets the thermal throttling temperature of his Core i7-3635QM to 105C.

    ARK | Intel® Core

    Some laptop manufacturers consider this temperature to be too high so Intel gave them the option to set an offset value to reduce the temperature when thermal throttling begins. Samsung is using this option and has set this value to 15 so the 3635QM now has a thermal throttling temperature of only 90C. (105C - 15C)

    When the CPU reaches 90C it will start to throttle and slow down and the harder you try to push it, the slower it will go. When stress testing, danimischiu's laptop was slowing down to just over 800 MHz. If this offset was not being used, this same CPU at 90C would be running 3 to 4 times faster.

    danimischiu adjusted this offset value to zero to try and get the CPU running at the Intel specified maximum temperature but changes to this register while in Windows were ignored. The only way to get rid of this premature throttling would be to write a modified bios.

    The offset value is located in MSR 0x1A2 in bits[27..24]

    If a modified bios sets those bits to zero, this should restore the thermal throttling limit to the Intel specified 105C value.

    If you want to see what offset value your laptop is using, you can run the MSR Tool, enter 0x1A2 in the MSR Number box and then click on the Read MSR button. If the second digit from the left is the EAX register is the letter F, that means your CPU has a 15C negative offset to the normal throttling temperature. I believe a lot of tablets are using this offset feature as well.

    MSR Tool
    MSR.zip

    [​IMG]
     
    unclewebb, Jun 1, 2013
    #3