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    Vaio SZ - overclocking the nVidea GPU

    Discussion in 'VAIO / Sony' started by zii, Oct 16, 2008.

  1. zii

    zii Notebook Consultant

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    Dear everybody,

    I have been trying in vain for a while to change the speed of the Go 7400 on the Vaio SZ, and I think that the BIOS has locked the speed of the FSB so that overclocking (or under clocking) cannot be performed.

    My initial thought was to install an OEM BIOS for the motherboard, but its unlikely to exist, and I am unlikely to find it, and if so, I would likely brick the notebook in the process.

    I remember reading a thread about changing the BIOS to enable Virtulization on the SZ series, and know that some people had some success. Does anyone know how to edit the BIOS to unlock the FSB (I think that this might be the right place)?

    Regards, z.
     
    zii, Oct 16, 2008
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  2. hmkim

    hmkim Notebook Enthusiast

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    First, you don't OC a video card by changing the FSB. You use a program to do so.

    Second, OC'ing a video card would not result in any noticeable performance enhancement, especially on notebooks. I OC'ed a HD4850 by 70 MHz on my Q6600 @ 3.2 GHz desktop and gained only a 1 - 2 frame increase.
     
    hmkim, Oct 16, 2008
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  3. zii

    zii Notebook Consultant

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    You have misunderstood my question. The programmes you wrote about used to OC the cards do _not_ work on my laptop because the custom Sony Vaio BIOS has locked the ability out. (This is the same as the VT features ; The CPU can do it, but the BIOS is hardwired to disable the function).

    My comment about the FSB is wrong ! Here is the correction and explanation why I made a connection between FSB and GPU:
    http://www.tomshardware.co.uk/forum/124491-11-relationship
    (I had only read the first post and not the others)

    I intend to OC a lot more than 70Mhz (more like 200Mhz); even a 10 fps gain would be good.
     
    zii, Oct 17, 2008
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