How to Enable Intel Dynamic Acceleration (IDA) on Both Cores of a Core 2 Duo

Discussion in 'Windows OS and Software' started by unclewebb, Apr 21, 2010.

  1. unclewebb

    unclewebb ThrottleStop Author

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    It's OK to run ThrottleStop and RMClock at the same time but only use one of these programs to control your multiplier and VID settings. If you use both of these programs to control FID/VID then they will fight against each other over control of your CPU. You don't want that.

    You can use ThrottleStop to reduce your core voltage too.

    Make sure Dual IDA mode works on your laptop before using the DuaIDA=1 INI file option. If your laptop can not boot up reliably with EIST disabled in the bios then I don't recommend trying the Dual IDA option. A computer should be able to boot up and run without locking up whether EIST is enabled or disabled.

    Dual IDA should get correctly restored after you resume from hibernate or if you resume from stand by mode. If you are using RMClock to manage your voltage, you won't be able to use Dual IDA mode. The two are not compatible. Dual IDA locks both cores of your CPU to a single multiplier and to a single voltage.
     
  2. User Retired 2

    User Retired 2 Notebook Nobel Laureate NBR Reviewer

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    delete 10char
     
  3. Triple_Dude

    Triple_Dude Notebook Evangelist

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    That will require ThrottleStop to be running in the background via the tray, correct?
     
  4. unclewebb

    unclewebb ThrottleStop Author

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    To restore Dual IDA mode after you resume from sleep mode, ThrottleStop needs to be running. When minimized to the system tray, it can run for hours while consuming next to nothing in CPU resources so you don't have to worry that it is going to bog your system down when running like that.
     
  5. User Retired 2

    User Retired 2 Notebook Nobel Laureate NBR Reviewer

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    @unclewebb - On my u7600-1.2 2510P, the the x9 multiplier is 0.9V, the x10 (IDA) is 1.0V. That extra voltage could gives more overclockability. With setfsb I can get a stable 1.6Ghz@x9, but if I switch off a core in the bios and test IDA I can get 2Ghz@x10.

    Now only problem is the bios has locked down the Speedstep/EIST bit so I don't get dual-IDA. So the CPU switches to x9@0.9V when both cores are activated where i am once again limited to 1.6Ghz (0.9V). The possibility of an extra 300-400Mhz is tempting to try to figure out.

    Would you know what the likely code is to lock speedstep so that Throttlestop can't enable dual-IDA mode? I'd like to go digging through the bios code.
     
  6. unclewebb

    unclewebb ThrottleStop Author

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    One user successfully got Dual IDA mode working on his laptop (OCZ I think) by going into the bios and doing a tweak.

    The lock bit is in MSR 0x1A0 and is bit[20]. This info is in the Intel Manuals, Volume 3B. If you can find the wrmsr code for that register and are able to turn off the lock bit then you are set. Bit[16] is the flag to show when EIST is enabled or not but it can only be changed when the bit[20] lock is cleared. After you change that one bit then the bios would likely need a new checksum as well so it would work. This is beyond what I know how to do but it is certainly possible and has already been done by one user. Post here if you get this working on your laptop. I like hearing about success stories.
     
  7. User Retired 2

    User Retired 2 Notebook Nobel Laureate NBR Reviewer

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    Modifying the bios to unlock MSR 0x1A0 bit[20]

    Analysis which can be applied to other notebooks on how to do this is here. The 2510P uses some form of anti-tamper decompression on startup making the bios mod more painful.
     
  8. moral hazard

    moral hazard Notebook Nobel Laureate

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    Can you fix the link please, I might try this with my notebook (even though my ES SP9400 doesn't have IDA).
     
  9. StaFForD

    StaFForD Newbie

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    I have read up on this program and am wanting to try it

    after downloading I tried to start the program and I get an error stating "Could not open WinRing0.dll"

    After further research I found a reply stating that it could be in use by other programs and not allowing access. Unfortunately I have systematically closed programs to try to find any other program using this driver and nothing has worked.

    Any other advice would be appreciated because I would love to see how this works on my laptop

    thanks
     
  10. unclewebb

    unclewebb ThrottleStop Author

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    Are you in an account with Administrator privileges? You need that for this program to work.

    After a clean install of Windows, I know ThrottleStop runs OK. Some other program that uses this open source driver might have left some junk in the registry. One user had to go through his registry from one end to the other and delete all references to WinRing0. After that, he rebooted and ThrottleStop ran fine. The only other thing I can think of is an over zealous antivirus or anti-spyware type program blocking this driver from being installed.

    Very interesting to hear about turning the EIST lock bit off with a simple bios mod to get this trick working on more laptops.
     
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