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Thread: 8800GT voltage mods

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  1. #1
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    Thanks guys, for not slapping me silly for missing those 3 glaring post about the max voltage applyable to these cards.

    Just in case anybody else missed it 1.4v on the core should be safe but caution is advised.
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  2. #2
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    I tried the bios vmod and nothing doin, this crap card i have is a dud.........at this moment i will try any kind of a mod, my next mod is a real solder vmod.

  3. #3
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    Core clock stepping seems to be proportional to the shader clock, meaning if you set your shader clock around 1800 you should get smaller jumps in core clocks. It works tha way on my card (eVGA SC 8800GT), I get some pretty big jumps when the shader is at default value but upping it to beyond 1800mhz makes the core clocks move in smaller increaments.
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  4. #4
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    VGPU:1.3v wtercooled:

    3DMark Score 17231 3DMarks
    SM 2.0 Score 7218 Marks
    SM 3.0 Score 6777 Marks
    CPU Score 6352 Marks

    i7 3960X@5ghz, Asus Rampage IV Extreme, 8gb Gskill RipjawsZ PC19200C8, Corsair force GT 240go, 2XGTX Titan, MM Ascension, Seasonic X-serie Gold 1250W, Watercooling

    i7 3930K@5ghz, Asus Rampage IV Extreme, 8gb Gskill RipjawsZ PC17000C9, OCZ Vertex 3 120go, GTX670 DCU2 Top, MM Pinnacle, Corsair AX850, Watercooling

  5. #5
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    Quote Originally Posted by pinto View Post
    VGPU:1.3v wtercooled:

    3DMark Score 17231 3DMarks
    SM 2.0 Score 7218 Marks
    SM 3.0 Score 6777 Marks
    CPU Score 6352 Marks
    Mate does it scale any more with more GPU voltage?,. Also is the memory voltage stock?

    What brand card also

    Nice results and thanks for sharing.

  6. #6
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    Quote Originally Posted by pinto View Post
    VGPU:1.3v wtercooled:

    3DMark Score 17231 3DMarks
    SM 2.0 Score 7218 Marks
    SM 3.0 Score 6777 Marks
    CPU Score 6352 Marks


    Nice...

  7. #7
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    Quote Originally Posted by pinto View Post
    VGPU:1.3v wtercooled:

    3DMark Score 17231 3DMarks
    SM 2.0 Score 7218 Marks
    SM 3.0 Score 6777 Marks
    CPU Score 6352 Marks

    that is really nice for such a cheap card

  8. #8
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    Just ordered my Palit 3 phase 8800GT! Will be here in 3 days.

    http://www.xpcgear.com/be880gtt3.html

    Hurry up, they still have stock!
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  9. #9
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    Quote Originally Posted by Renegade5399 View Post
    Just ordered my Palit 3 phase 8800GT! Will be here in 3 days.

    http://www.xpcgear.com/be880gtt3.html

    Hurry up, they still have stock!
    i was going to get one from them, but they have some really bad reviews at resellerratings.com

    ..also i read that one guy ordered this card from them and got the regular edition with refference cooler and probably without the 3phase power

  10. #10
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    Quote Originally Posted by Renegade5399 View Post
    Just ordered my Palit 3 phase 8800GT! Will be here in 3 days.

    http://www.xpcgear.com/be880gtt3.html

    Hurry up, they still have stock!
    It doesn't say phase 3 anywhere on it and the picture even says "Actual item may differ from image shown"

    The part number doesn't come up on google, and the reference name is like this one:

    http://www.hardwareschotte.de/hardwa...GT+NE8800TT352

    Their main webpage doesn't list a product or part number either :/

    Be wary...

    Quote Originally Posted by winbond View Post
    i was going to get one from them, but they have some really bad reviews at resellerratings.com

    ..also i read that one guy ordered this card from them and got the regular edition with refference cooler and probably without the 3phase power
    Not a good sign.
    Last edited by Hazaro; 11-12-2007 at 02:33 PM.

  11. #11
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    OVP protection, i think, above 1.3v (or my card doesn't like more volt)
    stock volt on memory but not max out (at least 1070mhz possible but not tested with 860mhz gpu)
    My card is a BFG OC
    temp wasn't really good 49°c full load (the Q6600 at 1.64v gets really hot)
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  12. #12
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    Quote Originally Posted by pinto View Post
    OVP protection, i think, above 1.3v (or my card doesn't like more volt)
    stock volt on memory but not max out (at least 1070mhz possible but not tested with 860mhz gpu)
    My card is a BFG OC
    temp wasn't really good 49°c full load (the Q6600 at 1.64v gets really hot)
    Yep, you are correct about OVP, 1.3v is the max you can get without it kicking in. Anything above 1.3v and my card will stop responding after a few minutes and mm reading is 0.01v until computer is powered down and restarted.
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  13. #13
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    hmmm 1.3 that's bad news
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  14. #14
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    Maximum Volt Mod

  15. #15
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    just gotta see now whether that OVP point that was pointed out earlier in the modding thread will work....just need to get someone to test this out now
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  16. #16
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    Is it possible to do the OVP mod by penciling the resistor? If so I'd be willing to play guinea pig.
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  17. #17
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    Quote Originally Posted by Mysterfix View Post
    Is it possible to do the OVP mod by penciling the resistor? If so I'd be willing to play guinea pig.
    Does the OVP play any role in BIOS max voltage?

  18. #18
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    i don't think bios can select that much voltage
    '
    from what people are reporting max 1.2v
    so you have to hard mod but if only 1.3v it is not worth it unless you are going to push it on DICE
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  19. #19
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    Quote Originally Posted by Hazaro View Post
    Does the OVP play any role in BIOS max voltage?
    I have no idea. I measured the OVP resistor and got 3.22k So I penciled it down to 2.77k and it seems to have done the trick!

    I'm now able to set vGPU to 1.35v which is 1.4v under load! I played a 1/2hr. of CoD4 without any issues. I used to get a black screen after less than a minute.

    It would be nice if one of the experts could tell me what the proper resistance should be for the OVP mod on GT cards.
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  20. #20
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    Quote Originally Posted by Mysterfix View Post
    I have no idea. I measured the OVP resistor and got 3.22k So I penciled it down to 2.77k and it seems to have done the trick!

    I'm now able to set vGPU to 1.35v which is 1.4v under load! I played a 1/2hr. of CoD4 without any issues. I used to get a black screen after less than a minute.

    It would be nice if one of the experts could tell me what the proper resistance should be for the OVP mod on GT cards.
    How hot is it getting?!

  21. #21
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    Quote Originally Posted by Hazaro View Post
    How hot is it getting?!
    Not hot at all really, went up 2ºc on the core (40ºc-42ºc)

    Mosfets and vregs are in hte mid to upper 40's sinked without a fan and mid to upper 30's with a fan.
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  22. #22
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    Quote Originally Posted by Mysterfix View Post
    I have no idea. I measured the OVP resistor and got 3.22k So I penciled it down to 2.77k and it seems to have done the trick!

    I'm now able to set vGPU to 1.35v which is 1.4v under load! I played a 1/2hr. of CoD4 without any issues. I used to get a black screen after less than a minute.

    It would be nice if one of the experts could tell me what the proper resistance should be for the OVP mod on GT cards.
    Which one is the OVP resistor?
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  23. #23
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    Quote Originally Posted by Mysterfix View Post
    I have no idea. I measured the OVP resistor and got 3.22k So I penciled it down to 2.77k and it seems to have done the trick!

    I'm now able to set vGPU to 1.35v which is 1.4v under load! I played a 1/2hr. of CoD4 without any issues. I used to get a black screen after less than a minute.

    It would be nice if one of the experts could tell me what the proper resistance should be for the OVP mod on GT cards.
    Can you pinpoint which resistor it is and I can check mine. I am at 810/1944/2000 with air cooling @ 1.285 volts under load (Thermalright V2). Only 63C under heaviest load. I would like to try the pencil mod for the OVP to see if I can catch you water cooling boys. LOL

  24. #24
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    Oh my I need to find my magnifier. I forget how small of an area I'm dealing with.
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  25. #25
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    some mixed responses here

    does anyone have a way to bypass OVP so far

    and people watercooling without full blocks

    what are you putting heatsinks on
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