Unofficial BIOS to fix throttling for G73SW

Discussion in 'ASUS Gaming Notebook Forum' started by dkillone, Dec 13, 2011.

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  1. dkillone

    dkillone Notebook Evangelist

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    This fix is 100% unofficial, and will require you to flash the BIOS. Which can be done with EasyFlash from within the BIOS menu. This is still done at your OWN RISK, so I am NOT responsible for any laptops not working after flashing.(However as a side note, flashing the bios is a fairly safe thing to do, especially when using the built in flasher Asus already provides.)
    *Warning, this also might put more strain on your battery when running on battery only, But I've yet so see any difference during my test. Just beware of the possibility, I am in no way responsible for any damages done.

    To understand more about the kind of throttling this fixes, CLICK HERE.

    The basic rundown is that BD-PROCHOT causes the CPU to throttle to 798mhz(it also goes down to 997mhz and 1496mhz as well) when there is significant load on the CPU + GPU at the same time. So this wont happen in all games, or applications. But as more powerful games get released, the more we will see throttling.

    Anyhow, what this fix does is disable Bi Directional PROCHOT within the bios, so there will be no need to run Throttlestop on bootup anymore. I've been using this bios for quite some time, and I have had no problems, so the risk should be minimal. Also, as a bonus, this bios also enables AES(Learn More) that Asus so kindly forgot to implement into our original bios. The download link is below and the instructions for flashing will be below that.

    Download: G53SW_AES_Throttle-Fix.zip
    Download:
    G73SW_AES_Throttle-Fix.zip
    Download: G74SX_AES_Throttle-Fix.zip


    Instructions:


    Step 1: Download the file above, extract the 2 files onto a flash drive. Leave the flash drive plugged in.
    (EDIT: Please do not flash the file from the HDD/a NTFS partition drive. It could brick the laptop, so if you don't have a flash drive, I know it would suck, but try to at least borrow one to flash otherwise, I wouldn't recommend it. One user has already suffered, and I'd hate to see another. This is an Asus problem, nothing to do with the bios being custom(it can happen flashing a bios straight from asus's website). Also be aware of using the usb3 port to flash, it may cause problems. So to be on the 100% safe side, stick to the usb2 ports.)

    Step 2: Reboot the computer, and press and hold F2 to get into the bios. Go to Advanced tab, then Start EASY FLASH.

    Step 3: You should see the 2 extracted files once into easy flash. Using arrow keys, choose the one with _TFIX(_ORIG is for if you want to go back to default bios). Then hit enter and Yes to update. Let it do its thing, (it will shutdown, but just turn it back on after it shuts down).

    Step 4: Once your back into windows, to test for success, download this MSR Tool and type in 0x1fc in the MSR Number box, then click Read MSR. Under the EAX box, you should see "0x0004005E", E being the key here that BD-PROCHOT is disabled(it will be F, it PROHOT is still enabled).

    Step 5(optional): You can also test by running Prime95 + Furmark at the same time. Using RealTemp 3.67 to monitor cpu clocks. It should never fall below 1995mhz essentially, but for me, lowest I see it go is 22xxmhz.

    --------------------------------------------------------------------------------------

    And thats it! Shouldn't see any throttling.<strike> I do have plans to do the fix for 53SW + G74/53SX owners, but since I don't own those laptops, I'd prefer to test it on those before releasing, so if you would like to test, PM for the link, and I will let you test. Once we can confirm it working, I will post it here.</strike>
    Edit: Now have been tested and fully working thanks to AbbyY on ROG forums for testing and confirming G74SX TFIX bios works and steelblueskies for testing/confirming the G53SW TFIX bios. :>

    Thanks for reading, Asus doesn't seem to have their own bios fix in the works, so this seems to be the best we can do.
     
  2. ALLurGroceries

    ALLurGroceries   Super Moderator

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    You should warn against using battery power with PROCHOT disabled. If you max out the GPU+CPU your battery may fail.

    Also curious as to how you went about disabling it. Did you author the BIOS mod yourself?
     
  3. dkillone

    dkillone Notebook Evangelist

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    As far as I can tell, the CPU still runs at the same speeds when PROCHOT is enabled or disabled when on battery. Ive been testing for a couple of weeks, even on battery a few times, with no problems. So don't think it would cause any batteries to fail.

    And yup, I edited the bios myself with the AMIBCP tool, it was posted a few weeks back on the G73SW owners board. Its a pretty straightforward GUI bios editor. I know it was just posted recently for the JH but it works for all G73/74/53 bioses as I've checked them all out to see the options.
     
  4. ALLurGroceries

    ALLurGroceries   Super Moderator

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    OK, back when first testing with the G51J it melted a few batteries. The G73 might have a more powerful battery, but I still wouldn't risk it myself.

    Nice to have the tools you need, eh (AMIBCP for APTIO UEFI). Would have saved us all a ton of time two years ago... :-/
     
  5. dkillone

    dkillone Notebook Evangelist

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    Ah, fair enough, yeah, I waited quite some time to make sure this is 100% safe, seems to not really be any different than running Throttlestop to fix it, except now it's disabled 24/7 and no matter what OS your running.

    I put the warning up though, so users that do decide to flash know. So thanks for the forewarning, hopefully we don't see anybodies batteries melt/die here.
     
  6. tijo

    tijo Sacred Blame Super Moderator

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    Good thing you put the warning there, people will flash knowing the potential risks. Even if it ends up not being perfect, it is still a nice fix for SW owners out there.
     
  7. dkillone

    dkillone Notebook Evangelist

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    Yup, I don't see the harm in putting up a warning just in case.But hrrmm, I just did a test in GTA4 logging cpu clocks with BD-PROCHOT disabled, then enabled when on battery only. The CPU clocks still drop no matter what even when PROCHOT is disabled.

    So I'm not sure what BD-PROCHOT exactly did for the G51J. But it has to be done differently on the G73SW, as even with CPU set to use 100% within Windows Power settings, it still drops to around 1600mhz and under the entire time I'm on battery during GTA4. So BD-PROCHOT being disabled only seems to help when on AC power.

    Maybe I'm doing something wrong, but I just had assumed since so many used TS to stop the throttling, which all TS did was disabled PROCHOT, and thats been safe to use. That disabling in bios wouldn't be any more harmful to the battery.
     
  8. fluffykorky

    fluffykorky Newbie

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    Thanks a lot!! This BIOS has fixed the Throttling issue on my G73Sw and now it's faster than ever!!

    This is a must install BIOS for anyone with a G73Sw

    Good job!
     
  9. rickenbacker78

    rickenbacker78 Newbie

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    hi all: would this BIOS work for a G53SW model too or it's a completely different story? thank you.
     
  10. steelblueskies

    steelblueskies Notebook Geek

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    three questions:

    1.with your aes enable, is new microcode patched in alongside the enable bit for 2630qm chips still using a microcode 14[mine](or any microcode prior to 19 which was the earliest aes-ni supported version for this cpu afaik)?

    2.is the same answer applicable to the g53sw version?

    3(slightly offtopic). in amibcp advanced>power and performance>cpu power management control -do you happen to know what 01c9 ac brick capacity is all about and why does it read 90w with a g53sw 203 bios loaded? holdover/baddata?

    just found it odd while looking at doing it manually before finding your post here.
     
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