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Xfx 9800gt voltmod fail =(

post #1 of 10
Thread Starter 
Hi dudes im from argentina and my ingles is bad ok tongue.gif


Well this is my PCB.


334


I try mod my xfx 9800gt without succes. i use a 20k VR and dont wanna boot.

its almost the same pcb but i dont have this 301 because its empty. All that its the same =)

463




My vgpu regulator is BN-AH41D...


I have the same card like @nateman_doo... See this **** man... *** this boy is doing..??? I need the final MOD =(

http://www.overclock.net/t/391307/how-to-vmod-your-8800-gs-gt-gts-9600-gs-gso-gt/550


I just wanna do the voltmod gpu because my memos run at 2130. PLease help me with that boys!!! Thanks
post #2 of 10
Thread Starter 
I have news for my vgpu chipset... Someone cant help me with this? Thanks


458



I try this but not work... Because is not the same chip.


565
Edited by elpiru - 5/8/12 at 10:50pm
post #3 of 10

the mods should work just fine... I have completed both successfully 

 

 

 Please measure resistance to ground from the yellow dot and post the ohm reading for confirmation... Use the picture from the first post, and measure exactly as the 2x blue wires are landed please.

post #4 of 10
Thread Starter 
Hi Cl3p20! Thanks for help me

Here are the resistances,only vmem works fine.

334



This pencil mod fail too. The Resistances cant be modify like this. =)

550


Please show me the points to solder, and how i use the Vr in that points. =)

Edited by elpiru - 5/12/12 at 12:33am
post #5 of 10

550x550px-LL-6ba277f2_131695d1259948480-ocn-volt-mod-squad-hwbots-finest-07_xfx_8800gt-8800gs-9600gso_vgpu-mod.jpeg

 

*using Digital Multi Meter - 

 

1. Please check the "blue" resistor on each side for connection to ground - record stock resistance value

2. Please check the "yellow" resistor on each side for connection to ground - record stock resistance value

 

3. (stock resistance *20) = the approx. value to start with VR

ie. - stock resistance = 1.07k  then (1.07k *20) = VR size for mod

 

4. Use ANY ground connection on the PCB and solder 1x leg of the VR to ground

5. Solder the 2nd leg of the VR to mod point

6. Tune resistance back to stock level, once VR is soldered inline

 

------- You should now be back at stock resistance and voltage... and ready to measure voltage as you decrease the resistance (by turning VR when GPU is powered on)

 

 

***FYI - the mod IS the same as the first one posted.. 100% certain of this.

post #6 of 10
Thread Starter 
Quote:
Originally Posted by CL3P20 View Post

550x550px-LL-b8e9690b_550x550px-LL-6ba277f2_131695d1259948480-ocn-volt-mod-squad-hwbots-finest-07_xfx_8800gt-8800gs-9600gso_vgpu-mod.jpeg

*using Digital Multi Meter -  I use a digital multimeter

1. Please check the "blue" resistor on each side for connection to ground - record stock resistance value
0.13k ohms resistance and 0.01k ohms the other side

2. Please check the "yellow" resistor on each side for connection to ground - record stock resistance value
0.13k ohms resistance and 0.01k ohms the other side


3. (stock resistance *20) = the approx. value to start with VR
ie. - stock resistance = 1.07k  then (1.07k *20) = VR size for mod

4. Use ANY ground connection on the PCB and solder 1x leg of the VR to ground
5. Solder the 2nd leg of the VR to mod point

Whats the point mod... Because i try, can u write in the photo? Sorry for my ingles =)



***FYI - the mod IS the same as the first one posted.. 100% certain of this.
post #7 of 10
Thread Starter 
Why this dont work man???

something is wrong, its for the revision of Pcb?

300
post #8 of 10
if the resistance between the mod point & ground is 0.13k (130 ohm) 20 k VR might be a bit big (cl3p was using it as an example), 0.13k x 20 = 2.6k VR for ideal size, I'd probably use a 5K there.
    
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CPUMotherboardGraphicsRAM
i7 990x/3930k/3770k/4770k GB x58a-OC/Asus RIVE/x79 gd65/z77 mpower/z77 MV... gtx480s/gtx580s/7970s/680s/Titan Hyper/PSC/BBSE/Hynix/Samsung 
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post #9 of 10
Thread Starter 
Quote:
Originally Posted by FtW 420 View Post

if the resistance between the mod point & ground is 0.13k (130 ohm) 20 k VR might be a bit big (cl3p was using it as an example), 0.13k x 20 = 2.6k VR for ideal size, I'd probably use a 5K there.


you think the 5k can be work? i set already 5k of the 20k and didnt work at the moment... I dont understain why, because the vmem work fine at least
post #10 of 10

Mod should work.. lower resistance more. 

 

with 130ohm stock level, your going to need to drop VR below 2.6k ohms to be at a voltage higher than stock.. this is why 5k is not changing voltage

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