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My first Vmod need help :DDD

post #1 of 29
Thread Starter 
hello guys, i have a old Palit GeForce GTS 250 E-Green 1GB, i really need to increase vcore, i try all program for do that but I realized that it is impossible to do with Software so I'm here to ask for help smile.gifthumb.gif

this is the GPU power circuit(NCP5388) :
Stock Voltage 1.2V






This is the memory voltage regulator (APW7068):







Thanks to all! so I hope to succeed in this venture
Edited by marcokrtsho - 3/18/14 at 7:52am
post #2 of 29
Measure the resistance between the VFB pin 19 and ground on the GPU circuit. Multiply by 20 and use this size variable pot for VCORE adjustment. Same goes for VMEM pin 6 to ground but I don't recall the pot ratio right off hand, seems like 20:1 should be OK for both though.
Edited by t_russell - 3/18/14 at 8:03am
post #3 of 29
I'm not very familiar with hard volt mods, but have you already reflashed your BIOS to fully unlock Fermi voltages? Or are you now trying to go higher than that?
post #4 of 29
Thread Starter 
Quote:
Originally Posted by t_russell View Post

Measure the resistance between the VFB pin 19 and ground on the GPU circuit. Multiply by 20 and use this size variable pot for VCORE adjustment. Same goes for VMEM pin 6 to ground but I don't recall the pot ratio right off hand, seems like 20:1 should be OK for both though.

will try it! and I'll keep you updated....thanks really!!!!
Quote:
Originally Posted by mocboy123 View Post

I'm not very familiar with hard volt mods, but have you already reflashed your BIOS to fully unlock Fermi voltages? Or are you now trying to go higher than that?

with flash bios changes only the label not increase really the voltage value....sadsmiley.gif


sorry for bad english!!! biggrin.gif
post #5 of 29
Thread Starter 
Quote:
Originally Posted by t_russell View Post

Measure the resistance between the VFB pin 19 and ground on the GPU circuit.

Sorry for my ignorance, can i use the pin 14 or 35 (on GPU power circuit) ? or i must use a ground on the circuit? because i dont' know how find it biggrin.gif

thank you much!!!!!
post #6 of 29
Any ground should be fine. Those pins will work.

I typically use a ground on the pcie connector to probe continuity around the board for other ground points.
    
CPUMotherboardGraphicsRAM
E8400, E8600, 980BE T2RS+, P5E3, TA890FXE 8800GTS's,GTX's,GS,Ultra's,9600GT Lots of D9's and some crap DDR3 
Hard DrivePowerCase
Seagate 250GB + 80GB WD for benching TT 875w, Corsair 650TX Custom bench station 
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CPUMotherboardGraphicsRAM
E8400, E8600, 980BE T2RS+, P5E3, TA890FXE 8800GTS's,GTX's,GS,Ultra's,9600GT Lots of D9's and some crap DDR3 
Hard DrivePowerCase
Seagate 250GB + 80GB WD for benching TT 875w, Corsair 650TX Custom bench station 
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post #7 of 29
Thread Starter 
Quote:
Originally Posted by PizzaMan View Post

Any ground should be fine. Those pins will work.

I typically use a ground on the pcie connector to probe continuity around the board for other ground points.

Thank you!!!!! tomorrow i will check the resistence for calculate the size variable pot for VCORE and VMEM...i hoep all will work biggrin.gif:D:D
post #8 of 29
Thread Starter 
i don't understand why in all picture i see no one solder on the pin, but near(look the picture):



sorry again for my big ignorance!! smile.gif
post #9 of 29
Thread Starter 
Another question...when i found the size of VR, i will set it with the max or min?

Thanks all!!!
post #10 of 29
Quote:
Originally Posted by marcokrtsho View Post

i don't understand why in all picture i see no one solder on the pin, but near(look the picture):



sorry again for my big ignorance!! smile.gif

Same idea as testing for another ground on the card. Test for continuity close to the pin. Find a larger solder point that is directly connected to the pin by a trace on the board.
Quote:
Originally Posted by marcokrtsho View Post

Another question...when i found the size of VR, i will set it with the max or min?

Thanks all!!!

Set it to max resistance. For example, if you originally have 1k ohm and you add a 20k ohm in series, the final result will be .95k ohm.
    
CPUMotherboardGraphicsRAM
E8400, E8600, 980BE T2RS+, P5E3, TA890FXE 8800GTS's,GTX's,GS,Ultra's,9600GT Lots of D9's and some crap DDR3 
Hard DrivePowerCase
Seagate 250GB + 80GB WD for benching TT 875w, Corsair 650TX Custom bench station 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
E8400, E8600, 980BE T2RS+, P5E3, TA890FXE 8800GTS's,GTX's,GS,Ultra's,9600GT Lots of D9's and some crap DDR3 
Hard DrivePowerCase
Seagate 250GB + 80GB WD for benching TT 875w, Corsair 650TX Custom bench station 
  hide details  
Reply
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