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SAPPHIRE HD 7870 Wont Overvolt

post #1 of 5
Thread Starter 
Hey there im wondering if anyone will be able to help with a small problem i have run into whilst overclocking my HD7870 ghz Edition.

I purchased this card in March 2012 and the card its self has been solid from day one.

However, i am ready to start overclocking the card and have ran into a problem where there V.core will not adjust no matter what i try.

Tools used: Asus GPU Tweak, Sapphire Trixx, MSI Afterburner , MSI Kombustor and AMD CCC Overdrive.

At stock voltage the card can reach 1100mhz - Core and 1450Mhz Memory. However whenever i try to increase the voltage a tad its like the new setting hasn't been applied at all. The sliders move on the GUI within the respected programs but when i launch MSI kombuster to burn in the GPU the V.core is still at the stock 1219mv, Resulting in a system crash due to the new clocks being applied and not enough voltage.

Just wondering if anyone can shed any light on the matter.

Thanks for any replies.


System Specs : Asus P8P67 PRO - B3, i5 2500k @ 4.5ghz, 8gb Corsair XMS, Corsair AX850 PSU, SAPPHIRE HD7870 GHZ Edition.
post #2 of 5
Quote:
Originally Posted by dragonfly789 View Post

Hey there im wondering if anyone will be able to help with a small problem i have run into whilst overclocking my HD7870 ghz Edition.

I purchased this card in March 2012 and the card its self has been solid from day one.

However, i am ready to start overclocking the card and have ran into a problem where there V.core will not adjust no matter what i try.

Tools used: Asus GPU Tweak, Sapphire Trixx, MSI Afterburner , MSI Kombustor and AMD CCC Overdrive.

At stock voltage the card can reach 1100mhz - Core and 1450Mhz Memory. However whenever i try to increase the voltage a tad its like the new setting hasn't been applied at all. The sliders move on the GUI within the respected programs but when i launch MSI kombuster to burn in the GPU the V.core is still at the stock 1219mv, Resulting in a system crash due to the new clocks being applied and not enough voltage.

Just wondering if anyone can shed any light on the matter.

Thanks for any replies.


System Specs : Asus P8P67 PRO - B3, i5 2500k @ 4.5ghz, 8gb Corsair XMS, Corsair AX850 PSU, SAPPHIRE HD7870 GHZ Edition.

Sounds like the voltage is locked on the card. Sometimes a BIOS flash to an unlocked version can fix this only if the voltage lock is software based.
X79-GCN
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X79-GCN
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Intel 3930K 4.5GHz HT GIGABYTE GA-X79-UP4 AMD R9-290X GEil Evo Potenza DDR3 2400MHz CL10 (4x4GB) 
Hard DriveCoolingCoolingCooling
Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
CoolingCoolingCoolingCooling
XSPC Chrome Compression Fittings EK RES X3 150 Primochill PremoFlex Advanced LRT Clear 1/2 ID EK-FC (R9 290X) 
CoolingCoolingCoolingOS
EK D5 Vario Top-X  Phobya G-Changer V2 360mm Phobya G-Changer V2 420mm Win 10 x64 Pro 
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post #3 of 5
Thread Starter 
Quote:
Originally Posted by BradleyW View Post

Sounds like the voltage is locked on the card. Sometimes a BIOS flash to an unlocked version can fix this only if the voltage lock is software based.

Thanks for the reply.

Yeah i read that somewhere but i got the card pretty much just after they were released...would that make any difference?
post #4 of 5
Quote:
Originally Posted by dragonfly789 View Post

Thanks for the reply.

Yeah i read that somewhere but i got the card pretty much just after they were released...would that make any difference?
Yes. They might have had the first revision come with voltage locked, or even hard locked. Look into BIOS flashing to see if your card is limited BIOS wise.
Try Guru3d and rage3d forums, ATi section.
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Intel 3930K 4.5GHz HT GIGABYTE GA-X79-UP4 AMD R9-290X GEil Evo Potenza DDR3 2400MHz CL10 (4x4GB) 
Hard DriveCoolingCoolingCooling
Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
CoolingCoolingCoolingCooling
XSPC Chrome Compression Fittings EK RES X3 150 Primochill PremoFlex Advanced LRT Clear 1/2 ID EK-FC (R9 290X) 
CoolingCoolingCoolingOS
EK D5 Vario Top-X  Phobya G-Changer V2 360mm Phobya G-Changer V2 420mm Win 10 x64 Pro 
MonitorKeyboardPowerCase
BenQ XR3501 35" Curved Corsair Vengeance K90 Seasonic X-1250 Gold (v2) Corsair 900D 
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X79-GCN
(22 items)
 
  
CPUMotherboardGraphicsRAM
Intel 3930K 4.5GHz HT GIGABYTE GA-X79-UP4 AMD R9-290X GEil Evo Potenza DDR3 2400MHz CL10 (4x4GB) 
Hard DriveCoolingCoolingCooling
Samsung 840 Pro 120GB EK Supremacy (CPU) NF F12's P/P (360 Rad)  NF A14's (420 Rad)  
CoolingCoolingCoolingCooling
XSPC Chrome Compression Fittings EK RES X3 150 Primochill PremoFlex Advanced LRT Clear 1/2 ID EK-FC (R9 290X) 
CoolingCoolingCoolingOS
EK D5 Vario Top-X  Phobya G-Changer V2 360mm Phobya G-Changer V2 420mm Win 10 x64 Pro 
MonitorKeyboardPowerCase
BenQ XR3501 35" Curved Corsair Vengeance K90 Seasonic X-1250 Gold (v2) Corsair 900D 
MouseAudio
Logitech G400s Senn HD 598 
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post #5 of 5
Some Sapphire cards have a bios toggle switch on them. My 7950 does, I don't know about other cards. Maybe you could try that, if you have it, try toggling (while turned off obviously) and see if it works?
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