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Need help voltmodding Sapphire HD 7850 - Page 2

post #11 of 14
Thread Starter 
I got some questions. Should I turn the pot when the system is ON or OFF? If its on should I go to BIOS first because AFAIK when system boots it runs at full speed means 3D voltage
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NZXT Phantom 240
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Intel Core i5 4670k AsRock Z87 Extreme4 Sapphire Nitro+ RX470 8GB 2x8GB Kingston ValueRAM DDR3-1600 @ 1866MHz 
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Windows 10 Professional x64 23" LG Flatron W2343T CM Storm QuickFire Pro Cherry MX Black keys Cosrsair CX750M 
CaseMouseMouse PadAudio
NZXT Phantom 240 Logitech G400 gaming mouse Razer Goliathus Omega Speed Edition Creative X-Fi Titanium HD (2xLME49720HA + 2xLME... 
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post #12 of 14
If you are trying to increase the voltage, only turn the VR when you are measuring the voltage and the system is ON. Other wise you don't know how the voltage is changing and you could be turning the card on with crazy high volts.

Before you even try to change the voltage, make sure the VR is turned to it's max resistance. This will make sure the default voltage stays approximately the same before you start trying to change it.

If it's full voltage in the BIOS, then that would be a good time to increase it thumb.gif
    
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CPUMotherboardGraphicsRAM
FX-8120, and a bunch more AM3/AM2+ Crosshair V, Crosshair IV Lots of green Dominator GT 
RAMRAMHard DriveCooling
Dominator GT Perfect Storm M4 64Gb Dihydrogen monoxide, Carbon dioxide, Liquid Nit... 
CoolingCoolingOSPower
OCN Marksman pot k|ngp|n F1 Dark pot Stripped Xp Antec 1200W HCP 
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post #13 of 14
Is there a posibility to do a simple pencil mod? I have Club3d radeon 7850 and it has the same chip on it. But i dont want to void guarante. Only soldering?
post #14 of 14
Thread Starter 
I finally got time and courage to do the mods, as I soldered the SMD closest to pin 18 to 500k VR to ground but weirdly the voltage didn't change at all when I turn the pot. Is there something wrong that I done? VR ground is to 6-pin PCIe ground

The VR is connected at the yellow circled area

900x900px-LL-73a3e1f1_a63f3deb_ncp5395t3col.jpeg
NZXT Phantom 240
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Intel Core i5 4670k AsRock Z87 Extreme4 Sapphire Nitro+ RX470 8GB 2x8GB Kingston ValueRAM DDR3-1600 @ 1866MHz 
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Samsung EVO 840 120GB 2TB Seagate Barracuda ST2000DM001 2TB Seagate Surveillance ST2000VX003 CoolerMaster Seidon 240M 
OSMonitorKeyboardPower
Windows 10 Professional x64 23" LG Flatron W2343T CM Storm QuickFire Pro Cherry MX Black keys Cosrsair CX750M 
CaseMouseMouse PadAudio
NZXT Phantom 240 Logitech G400 gaming mouse Razer Goliathus Omega Speed Edition Creative X-Fi Titanium HD (2xLME49720HA + 2xLME... 
Other
Rotel RA-820 amplifier + Mission 760i SE booksh... 
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NZXT Phantom 240
(17 items)
 
  
CPUMotherboardGraphicsRAM
Intel Core i5 4670k AsRock Z87 Extreme4 Sapphire Nitro+ RX470 8GB 2x8GB Kingston ValueRAM DDR3-1600 @ 1866MHz 
Hard DriveHard DriveHard DriveCooling
Samsung EVO 840 120GB 2TB Seagate Barracuda ST2000DM001 2TB Seagate Surveillance ST2000VX003 CoolerMaster Seidon 240M 
OSMonitorKeyboardPower
Windows 10 Professional x64 23" LG Flatron W2343T CM Storm QuickFire Pro Cherry MX Black keys Cosrsair CX750M 
CaseMouseMouse PadAudio
NZXT Phantom 240 Logitech G400 gaming mouse Razer Goliathus Omega Speed Edition Creative X-Fi Titanium HD (2xLME49720HA + 2xLME... 
Other
Rotel RA-820 amplifier + Mission 760i SE booksh... 
  hide details  
Reply
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