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Thread: x1900 volt mod?

  1. #1
    Xtreme Enthusiast
    Join Date
    Sep 2005
    Location
    Denton, TX
    Posts
    586

    x1900 volt mod?

    Im kinda suprised we haven't seen this yet. Is it not really necessary, since there are some software voltage controls? Or is it just difficult to figure out?
    Current 24/7 settings
    Delidded L628B e6400@ 3.6ghz 1.38v
    3.9ghz 1.56v dual prime, 4ghz dual 32m pi stable on water and P5B Deluxe
    Patriot 667 LLK @ 970 mhz 4-4-4-4 2.3v
    x1900xt 690/780

  2. #2
    Xtreme Vmod mod
    Join Date
    Aug 2004
    Location
    Cornwall/Newcastle uni, UK
    Posts
    1,234
    There is an NDA covering the Vgpu regulator on the card, so its very hard to get hold of the datasheets needed to work out the volt mods.
    The PCI-e 6800GT/U's use the same voltage regulator as the X1800/X1900 series of cards, so it should be possible to work something out from there.

    I've tried adapting the mod 6800 Vgpu mod to use on my X1800XL, but I couldn't get the voltage to change. I don't know if that was because the mod was incorrect, or because I didn't lower the resistance low enough, tho.

  3. #3
    Xtreme Enthusiast
    Join Date
    Sep 2005
    Location
    Denton, TX
    Posts
    586
    thats gimp. Well, i guess in time.
    Current 24/7 settings
    Delidded L628B e6400@ 3.6ghz 1.38v
    3.9ghz 1.56v dual prime, 4ghz dual 32m pi stable on water and P5B Deluxe
    Patriot 667 LLK @ 970 mhz 4-4-4-4 2.3v
    x1900xt 690/780

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