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Thread: dfi infinity nf2 vdrop and overcurrent mods

  1. #126
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    Originally posted by Vlad Draculea
    -te como yo.
    Eh?
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  2. #127
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    Any results yet? Mine stuck at 2.05V (bios reading)

    Also, I'm confused about measuring the vcore with a multimeter. I always want to do it but never know how. When you say measure the Vcore on the choke, are you talking about the biggest choke near the socket around the mosfets? Do I just stick the multimeter on the coil?

    Also, I've read if I slip, it's dead? Is slip = shorting it with order components?
    DFI NFII ultra infinity, 2600+M @240X11
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  3. #128
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    It's dead jim...

    Didn't do modz as things are getting to work .
    But have killed 2 boards w/ slippage.

    Be VERY CAREFUL and if possible keep finger near PSU power switch. If you get it fast enough after contact, you may keep your board. Kill power if you see/hear ANYTHING, don't wait for smoking stuff to happen.

  4. #129
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    I poke at the solder point on the motheboard, must less prone to slippage.

    All along the watchtower the watchmen watch the eternal return.

  5. #130
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    Hmm.

    Vlad, may I ask why you removed all the important posting of yours???
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  6. #131
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    Okay. I am at least gunna repost the missing pics...
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  7. #132
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    And the other one...

    edit.

    I must add the credits go to Vlad for this mod and picture. Bad circumstances... he's not here anymore. If you got questions to ask you'll find him over at XR.
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    Last edited by SAE; 05-20-2004 at 12:12 PM.
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  8. #133
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    If we completely removed the overcurrent resistors... would that be a bad thing..?

    All along the watchtower the watchmen watch the eternal return.

  9. #134
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    Originally posted by STEvil
    If we completely removed the overcurrent resistors... would that be a bad thing..?
    I definately think so. Resistance would be infinite and thus surely some part will dies/burn. Would be very ugly. I think those are also there in a protective sense...
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  10. #135
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    If they are only current limiting, though, removing them should only increase the maximum amount of current to infinite..

    Wish I had spare boards to play with... :/

    All along the watchtower the watchmen watch the eternal return.

  11. #136
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    This should work right? (of course after the SMD ones are removed) Just want to make sure before getting my soldering iron out.

    The reason behind this is

    1. I want to have control over the resistance so I can enable/disable when I like
    2. I have heatsink on my mosfet with artic adhesive
    3. I can't be bothered to calibrate different VRs
    DFI NFII ultra infinity, 2600+M @240X11
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  12. #137
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    Originally posted by cpl1234


    This should work right? (of course after the SMD ones are removed) Just want to make sure before getting my soldering iron out.

    The reason behind this is

    1. I want to have control over the resistance so I can enable/disable when I like
    2. I have heatsink on my mosfet with artic adhesive
    3. I can't be bothered to calibrate different VRs
    Don't do it this way, as every smd resistor depends on other electrical factors, and trimming them over one pot would be bad the the onboard circuitry. Vlad lined out before (shame you cannot read it anymore) that it would be dangerous...

    Do it with smds at 3.7k or 4.4k and you'll be fine. No adjustments anymore (I have 4.7k ones). And I also have adhesive sinked the mosfet transistors...
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  13. #138
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    Good looking mods... i cant seem to find anywhere it says what amount of resestence to use.... ?

    What are people useing for the Vcore? Do you have to make the Vsence the same as the Vcore? im a little confused on hoe you go about tunning that in. (2 pots for one goal)

    What do i replace those SMDs with? 4.7k resistor?

    What about the the Overcurrent mod? it says to set it and forget it, but what to?

  14. #139
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    Originally posted by SAE
    Okay. I am at least gunna repost the missing pics...
    see that 8-legged chip next to #2? That thing gets really hot!!!

    i suppose the one next to the northbridge heatsink may also get just as hot.. but after burning my finger (this is with over 360cfm of airflow) on the first one i didnt bother trying the other.

    All along the watchtower the watchmen watch the eternal return.

  15. #140
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    Originally posted by STEvil
    see that 8-legged chip next to #2? That thing gets really hot!!!

    i suppose the one next to the northbridge heatsink may also get just as hot.. but after burning my finger (this is with over 360cfm of airflow) on the first one i didnt bother trying the other.
    Yeah. I already supposed to cool these driver ICs... the middle on of the 3 should indeed be the hottest...
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  16. #141
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    heres a better pic of the vdroop mod.

    Dell Studio XPS16... no desktop
    yes i have AIM, yes you can send me a message. EvilSpork3 i dare you.

  17. #142
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    Hehe, Evil, your pics are everywhere
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  18. #143
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    hehe, i figure if i can help people out with better pics i will!

    besides i enjoy taking them, its a kinda hobby for me.

    if anyone has any requests for pics of parts i have just let me know ill supply them. give me a day or two and ill have similar pics to the one above. feel free to ask

    infinty pics ask ASAP, i have an extra board i might be sending back soon.
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  19. #144
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    hello,

    well, i have read the 6 page of the topic , but i don't understand how to do the vcore mod, because my english is so bad and your discussion about vcore mod is so blur for me


    Can you please make a step-by-step how-to for me? I need all details of your VCore modding adventure
    Please PM me,

    with my infinity i have do this :
    http://membres.lycos.fr/damsxx/35s.JPG
    http://membres.lycos.fr/damsxx/fsb250prime-end.JPG
    http://membres.lycos.fr/damsxx/2777prime.JPG

    so i need more vcore to go up !!!!!


    thanks
    Last edited by damsxx; 05-26-2004 at 07:55 PM.
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  20. #145
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    evil spork - what is the original resistance of the resistors for the vdrop / vdroop mod and does anyone know why making the resistance 0 would be a bad thing?

    All along the watchtower the watchmen watch the eternal return.

  21. #146
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    Originally posted by STEvil
    evil spork - what is the original resistance of the resistors for the vdrop / vdroop mod and does anyone know why making the resistance 0 would be a bad thing?
    2.4kohm iirc... but dunno exactly.

    If you short those OCP resistors you'd allow full current to pass through the circuits and go directly to the CPU. I would consider it a very bad thing if the CPU was grilled by too much current
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  22. #147
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    http://www.xtremesystems.org/forums/...048#post451048

    I was looking at evil_spork's pic wrong.. my bad.

    All I want is a stable vcore...

    Pin 4 to choke is what that pic looks like, is that correct? All I have is a 10k VR... wonder if thats too low?

    All along the watchtower the watchmen watch the eternal return.

  23. #148
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    Originally posted by STEvil
    [url]Pin 4 to choke is what that pic looks like, is that correct? All I have is a 10k VR... wonder if thats too low?
    No. That also wrong

    It's pin7, and that's the vdrop mod. It will drop your available vcore too, but make it more stable (less fluctuation).

    The OCP mod is changing those SMDs to 3.3-4k (more does not really help, dunno if it does not even worsen it)... you would get more current flow to the cpu mosfets thus supplying more to the cpu...

    1k VR is not too low for vdrop. I am using a 4.75k fixed res. But you'd have to put the vcore mod to pin7 as well to compensate the decreased vcore (vdrop)... set vcore to 1.825V in bios and turn up your vcore watching the voltage in bios. You should be able to get a more stable voltage output this way too.

    Gluck, pal. :thumbsup:
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  24. #149
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    Counting from the left its pin 4..

    All along the watchtower the watchmen watch the eternal return.

  25. #150
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    Originally posted by STEvil
    Counting from the left its pin 4..


    But you should always count from pin one... (watch the pit in the chip)
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