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Radeon X800 Non-Pro/X800 XL/X850 Voltmods

Discussion in 'Articles' started by Urlyin, Feb 13, 2005.

  1. VeDz New Member

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    ^bump^

    please help out :cry:
     
  2. infrared New Member

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    Yeah, 2.3v on the memory, when it's not being cooled is a little high, i'd drop back to 2.2v until you get a better cooler that cools the memory.

    The gpu overclock is typical of an R430 core, even when you feed them more voltage, you don't gain a lot. I found i gained the most from keeping it cooler rather than increasing the voltage.

    The 3dmark score could be a fluke, did you have any other programs running in the background?
     
  3. VeDz New Member

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    ah i c. i will try the 3dmark05 again.

    but gettin around a 7mhz increase for increasing it to 1.53 sucks. I am just gonna put it back to normal again.

    also ill put the vdd back to 2.2V but what about the VDDQ?

    and if i do the VID Mod on top of all these things will I get atleast 30 more mhz?

    one last thing. when I start my comp and the gpu temp is below 30 and takes a while for it to come, i can crank it up to 480core and 600 mem but as soon as it goes over 70 which is like 15 secs after the OC i get artifacts but for the 15 secs there were no artifacts even when the temp was 69. So i am guessing its all because of the cooling.

    Would you mind recommending me a good air cooler for the card preferbly in the Canada region.

    thanks
     
    Last edited: Nov 4, 2006
  4. regan1985 New Member

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    can any1 tell me if the pencil mod will work on my x850xt pci, as i have tried to mod the gpu and didnt work and i have been told the only mod that will work is a solder mod?? is this true?
     
  5. Urlyin

    Urlyin Senior Moderator

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    unless you have the resistor the pencil mod does not work...
     
  6. regan1985 New Member

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    so i have to solder then?? is it a doable mod for some1 who hasnt got much soldering experience
     
  7. Urlyin

    Urlyin Senior Moderator

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    Try to practice an old mobo or vid card till you get the confidence to try it on your x800... there are soldering how-to's out there, maybe check one of those out, but until you get in some trial and error, I wouldn't attempt it ...
     
  8. UnexplodedCow

    UnexplodedCow New Member

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    I've been looking around on the forums, but can't find any info on how to mod my card. It's a blue Sapphire X800GTO AGP, R480 core, 256MB 1.6ns mem with a rialto bridge. thing is, none of the caps or resistors on the board are numbered, and I've been looking. at best, the polarity sign for the caps is present, and component layout shapes, but nothing else. I did manage to find my VDD and VDDQ thought, both being at 1.99 volts, which is a little low from what I've been reading, which would explain why my card won't do beyond 550 OC, and other times it might do 590 for a month, then croak at random. The core is dang stable, pushing 570 no problem. I run it @ 560 just to be somewhat nice. I'm not really interested in pushing the core more, but I was hoping to get the ram speed up....anyone have info on modding my kind of card?
     
  9. Muk New Member

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    Did this mod on my x800xl, great guide! Previously i could get 425/530 stable. Upped VGPU to 1.43 with VID mod (.3 overvolt) but didnt see much increase, about 5 mhz. Upped it to 1.58 with VID mod (using just a pencil, no conductive paint needed) and it went to about 450 stable. Works at 460 in some games. I am using the stock cooler but it is a pretty good copper and 2 heatpipe cooler. This is on the AGP version. Under 70 load.

    The mem I was unable to raise above 2.06 using pencil mods. No matter how much pencil I put on, couldnt get the resistance lower than about 98 ohms. This didnt seem to help the mem OC. Upped VDDQ to the recommended 2.17. Didnt seem to help the OC by itself.

    I am curious if lowering voltage, and thus temperatures, would help me OC better. I read about someone in here lowering core voltage, having difficulties doing so, but eventually getting it working. If you are still here, would you mind elaborating on how you were able to undervolt? I assume you can only undervolt the core?
     
  10. UnexplodedCow

    UnexplodedCow New Member

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    Well, lowering the voltage does lower temps due to less current leakage, but amperage needs climb. After so many amps the power controller on the card will go into lockdown, as far as I've learned, freezing the card, giving the checkerboard pattern on the screen. Volt modding, in my understanding, somewhat tweaks the voltage controller to provide more voltage, using less amperage, so it won't go into lockdown as quickly. As we all know voltage+amperage= wattage. While lowering voltage may lower temps, it won't help with overclocking. The best bet to lower heat is to just put on a good heatsink.
     
  11. ny_driver

    ny_driver New Member

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    WOW,...nice mod!!! I wish I knew what I needed to do my card exactly like you did. I'm afraid I do not know how to figure the necessary things out( I'd be really happy if you would help me...looks like you really know what you are doing.
     
  12. UnexplodedCow

    UnexplodedCow New Member

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    Aye, that's a nice volt mod, man.
     
  13. Casheti

    Casheti New Member

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    Very nice indeed.
     
  14. ny_driver

    ny_driver New Member

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    I guess I got it figured out on my own, but it would be a waste of time with my current MOBO, CPU, and PSU. I'll get back to this project in a few weeks when I can afford to replace the aforementioned components.


    Happy New Year everyone:)
     

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