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XFX 5750 voltage bump

post #1 of 11
Thread Starter 
Okay since XFX has no dedicated OC software of they're own, have voltage locked my card and runs at a measly default of 1.1v (play hard? More like play safe biggrin.gif), i want to try pencil mod my card to just get 900-950Mhz out of the core. So far i'm stable at 850/1350 but i feel my card do a lot better. I've tried everything on the software front, including flashing to a BIOS with a default higher voltage but to no avail. The card wouldn't accept any voltage change no matter what i did (XFX suck, seriously! No wonder the lifetime warranty gimmick). I got a hold of a pic of my card's PCB from a fellow OCN member who tried doing the same and outlined the different resistors that could be shaded to facilitate a voltage bump.

450

I've tried shading the green resistors..on both sides but that made no difference. I doubt any voltage increased because temps were the same and card was still unstable beyond 850. The yellow one however, gets the card to act up. If i shade either side a little bit or a little too dark, the card starts up with the fan on 100% load and the screen stays blank. Any help guys? I'd really appreciate it. I have no experience with pencil mods neither do i have a multimeter. I just wanna shade enough on the right resistor to get a decent voltage bump.
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post #2 of 11
I had used Foothead's pencil mod on my HD 5750. You will have to dig into the HD5750 Club thread to find it. I got mine to 960 24/7 stable with it, and some got over 1100 on air. It will run much hotter.
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post #3 of 11
Thread Starter 
Quote:
Originally Posted by damric View Post

I had used Foothead's pencil mod on my HD 5750. You will have to dig into the HD5750 Club thread to find it. I got mine to 960 24/7 stable with it, and some got over 1100 on air. It will run much hotter.

Will it show which resistor to shade? Because i have no experience with pencil mods nor do i have a multimeter. I just wanna shade a little bit on the right resistor. Thanks for the help so far smile.gif
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post #4 of 11
Quote:
Originally Posted by PunkX 1 View Post

Will it show which resistor to shade? Because i have no experience with pencil mods nor do i have a multimeter. I just wanna shade a little bit on the right resistor. Thanks for the help so far smile.gif

If it is the same PCB (and most were), it has the exact resistor and also where to measure voltage and resistance.(if you decide to pick up a $10 meter). I will say this, it took several attempts before I got just the right amount of lead on there. Too much or too little made it unstable. Start with a little smile.gif

post #134 http://www.overclock.net/t/685064/hd-5750-club/130#post_8756830

Looks like same PCB. All the components are labeled the same.
Edited by damric - 7/18/12 at 2:07am
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post #5 of 11
Thread Starter 
Quote:
Originally Posted by damric View Post

If it is the same PCB (and most were), it has the exact resistor and also where to measure voltage and resistance.(if you decide to pick up a $10 meter). I will say this, it took several attempts before I got just the right amount of lead on there. Too much or too little made it unstable. Start with a little smile.gif
post #134 http://www.overclock.net/t/685064/hd-5750-club/130#post_8756830
Looks like same PCB. All the components are labeled the same.

Thanks for the find. I'll give it a shot smile.gif
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post #6 of 11
The pic linked in post #4 looks like it has a different controller, not sure if it will be helpful but worth a shot. A multimeter is invaluable when volt modding, for checking continuity & making it easy to find the right resistor & then seeing how much difference the shading makes to the voltage.
Also looking at the pic in the first post, quite a few capacitors are circled, ignore those, the resistors are usually black, the beige ones are smd caps.
    
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post #7 of 11
Thread Starter 
Quote:
Originally Posted by FtW 420 View Post

The pic linked in post #4 looks like it has a different controller, not sure if it will be helpful but worth a shot. A multimeter is invaluable when volt modding, for checking continuity & making it easy to find the right resistor & then seeing how much difference the shading makes to the voltage.
Also looking at the pic in the first post, quite a few capacitors are circled, ignore those, the resistors are usually black, the beige ones are smd caps.

I matched the said resistor in post #4 with the pcb of my card. My card's pcb has the exact same resistor (and that happens to be the resistor i didn't even shade at all tongue.gif). Hope it works. I'll shade very little at a time right? like a thin line across the side of the resistor?
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Ol' Faithful
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post #8 of 11
Thread Starter 
I guess i can't get any voltage control on my card since the resistor i'm supposed to shade is missing entirely from my card's PCB frown.gif. Screw XFX mad.gif
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Ol' Faithful
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post #9 of 11
It could also be that the resistors which control the voltage could be located elsewhere. A pic of your PCB could help out the guys figure it out A lot faster!
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post #10 of 11
Thread Starter 
Quote:
Originally Posted by jason387 View Post

It could also be that the resistors which control the voltage could be located elsewhere. A pic of your PCB could help out the guys figure it out A lot faster!

The pic in the OP is the PCB of my card.
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Ol' Faithful
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