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PENCIL | 4350 vGPU

post #1 of 10
Thread Starter 
working on pushing my 4350 to some high numbers today folks ! on the back of the card i located the two phase areas. earlier today i successfully raised my vMemory from stock 1.87v to 2.07v simply by penciling 4.17ohm (20k ohm setting on the DMM) to 3.77ohm.

trying to work the vGPU mod out though. the controller i have been working with, which i think is the vGPU controller, is decreasing the voltage when i decrease the resistance. stock voltage is 1.07~1.08v at 7.34ohm on the FB pin. when i pencil a corresponding resistor i get lower readings though. help would be appreciated !




Edited by cold.nut - 10/22/11 at 3:55pm
post #2 of 10
could be a 'reverse' FB.. try soldering a VR to add resistance
post #3 of 10
Thread Starter 
if my DMM is set to read 20k Ω and the IC reads 7.34Ω off of that. what size of variable resistor do i need? :shrug:

is it 20x(7.34)? i am confused on converting.
post #4 of 10
its around 150 ohms.. since your adding resistance.. you should be able to use a 200 ohm VR
post #5 of 10
Thread Starter 
Quote:
Originally Posted by CL3P20 View Post
its around 150 ohms.. since your adding resistance.. you should be able to use a 200 ohm VR
confused as to why is is only 7.34ohm x20. shouldn't my value be 7.34k ohm? it only showed up under the 20k setting on my DMM.
Edited by cold.nut - 10/23/11 at 1:47pm
post #6 of 10
sorry..missed that in your post above.. only saw the
Quote:
20x(7.34)
... in that case then it would be a 200k ohm VR as you would want more resistance than stock.
post #7 of 10
Thread Starter 
yeah caught that, thanks bud !

for the forums,

Visiontek 4350 Low Profile

vGPU & vMem datasheet

100K VR from PIN 6 or corresponding resistor ---> GND

did my 4350 mod last night and it worked like a charm
post #8 of 10
where are some numbers of before and after???
    
CPUMotherboardGraphicsRAM
4770k asus z97i-plus nvidia reference gtx 660 ti pc1600 
Hard DriveHard DriveCoolingOS
kingston 120gb OS kingston 240 stock hsf (intel) Windows 8.1 64 bit 
MonitorKeyboardPowerCase
Samsung 55" LCD Logitech El Cheapo antec 450 open air 
MouseMouse Pad
Gigabyte El Cheapo 
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CPUMotherboardGraphicsRAM
4770k asus z97i-plus nvidia reference gtx 660 ti pc1600 
Hard DriveHard DriveCoolingOS
kingston 120gb OS kingston 240 stock hsf (intel) Windows 8.1 64 bit 
MonitorKeyboardPowerCase
Samsung 55" LCD Logitech El Cheapo antec 450 open air 
MouseMouse Pad
Gigabyte El Cheapo 
  hide details  
Reply
post #9 of 10
Thread Starter 
results not posted because it hasn't gone cold yet tongue.gif. yes, believe it or not i am going to do DICE on this bad boy lol.
post #10 of 10
what overclocking sofware you use with that vmoded card? I have non-reference hard vmoded 4650 but i dont know what app i must use for overclocking. msi afterburnen dont work
Edited by munnis - 7/6/12 at 3:48am
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