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    G750JX drops to 800MHz. on Battery

    Discussion in 'ASUS Gaming Notebook Forum' started by ibbi1337, Jul 25, 2013.

  1. ibbi1337

    ibbi1337 Notebook Consultant

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    I have set the plan to high performance and min cpu state to 100% on battery and on power but the CPU speed drops to 800 Mhz. on battery

    I saw some posts on the ROG Forums that this laptop's battery cannot handle it so it drops to 800!?

    If this is true then this is really not a gaming laptop it is a gaming desktop that is easily portable but u cannot play games on the go with this POS
     
    ibbi1337, Jul 25, 2013
    #1
  2. pato

    pato Notebook Evangelist

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    Does it scale up to full speed once you put some load on the cpu?
     
    pato, Jul 25, 2013
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  3. ibbi1337

    ibbi1337 Notebook Consultant

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    oh i didn't try, will revert back
     
    ibbi1337, Jul 25, 2013
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  4. ibbi1337

    ibbi1337 Notebook Consultant

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    Just tried running some benchmarks, nope, it is locked @ 800 Mhz.
     
    ibbi1337, Jul 26, 2013
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  5. Draetor24

    Draetor24 Notebook Enthusiast

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    It's not a software based issue? Have you tried the different power plans? I know battery performance will never be as good as AC, but 800Mhz seems way too low for this CPU.

    I would be wary of whatever software came loaded at factory. I good test would be a clean install with updated drivers and then testing. I guess it could even be a driver issue or in need of a BIOS update.
     
    Draetor24, Jul 26, 2013
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  6. skip2mylou

    skip2mylou Newbie

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    Check power management settings

    Sent from my SGH-T989 using Tapatalk 4 Beta
     
    skip2mylou, Jul 27, 2013
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  7. Meaker@Sager

    Meaker@Sager Company Representative

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    It probably does that to provide the maximum performance to the GPU while on battery.
     
    Meaker@Sager, Jul 27, 2013
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  8. ibbi1337

    ibbi1337 Notebook Consultant

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    I think only a BIOS would fix this. I always do a clean install. This issue is present in both Win 7 Pro and in Win 8 Pro, no difference
     
    ibbi1337, Jul 27, 2013
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  9. Meaker@Sager

    Meaker@Sager Company Representative

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    Yes this will be enforced by the EC as opposed to software.
     
    Meaker@Sager, Jul 28, 2013
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  10. unclewebb

    unclewebb ThrottleStop Author

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    It's possible that ThrottleStop will let you work around this issue. Send me a PM if you want to do some Haswell beta testing.
     
    unclewebb, Jul 28, 2013
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  11. ibbi1337

    ibbi1337 Notebook Consultant

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    check your PM
     
    ibbi1337, Jul 28, 2013
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  12. Meaker@Sager

    Meaker@Sager Company Representative

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    Just be careful of your battery.
     
    Meaker@Sager, Jul 29, 2013
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  13. unclewebb

    unclewebb ThrottleStop Author

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    Message with link finally sent.

    Edit: Intel d00d did some testing and it looks like Asus is using the BD PROCHOT method to throttle his CPU down to 800 MHz when on battery power. This is basically a way to trick the CPU into thinking it is running too hot so the CPU responds the same as if it was over heating. Throttling starts and drops the multiplier down to 8 on battery power. Using ThrottleStop to disable the BD PROCHOT signal path is an easy fix. After that, the CPU is running at its proper speed with multipliers over 33 on his Core i7-4700HQ. Not bad when changing a single bit in the processor allows you to run your CPU 4 times faster compared to what Asus lets you run when on battery power.

    Hopefully the next version of ThrottleStop will be ready in the near future with Haswell support and a few more goodies for UM CPU owners.
     
    unclewebb, Jul 30, 2013
    #13