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Unlocking volts/clock caps on HD 6950

post #1 of 5
Thread Starter 
Hey guys, I've been doing research a lot lately on how to get the most out of the HD 6950, and because of the ability to flash BIOS on it is why I bought it.

I have a Sapphire HD 6950 2GB. I've decided like many others, not to flash it to a 6970 BIOS for the memory timing reasons, but I have modded the BIOS to have the 1536 unlocked shaders. I was wondering how everyone is unlocking their voltage and clock caps (currently at 840/1325). I've read many people are flashing ASUS 6950 BIOS and installing Smart Doctor, ticking the unlock, uninstalling, then using CCC or After Burner from there.

The other way I was reading was to edit the CFG file for After Burner to Enable Overclocking, but the CFG file seems to be different in the newest version and beta. It contains:

[ATIADLHAL]
UnofficialOverclockingEULA=
UnofficialOverclockingMode= 0
AccessibilityCheckingPeriod= 0

When I change UnofficialOverclockingMode = 1, I still get no unlocked clocks. And MSI AB lets me change the voltage to 1.175 from 1.1, but I'm pretty sure the card doesn't actually run at 1.175. GPU-Z, Kombustor, AB, and HWMonitor don't register the new voltage. I have also read that most of those monitoring programs do not display the new voltage as well.

And I also am aware of using RBE to modify a BIOS file to allow for higher clocks/voltages while unlocking shaders all in one. But I have definitely not gotten that to work yet, and when I have tried I have screwed up my BIOS forcing me to switch to 2 and reflash my stock BIOS. I know that AMD is pretty strict on the modifying of their BIOS, and encryption keys are used to make sure all is well. Maybe the BIOS modifying is a little beyond me , but I am definitely willing to learn and study if anyone has a link to somewhere I can learn.

Basically my main goal is to have a 6950 with 6970 shaders, clocks, and voltages; if that's possible. Any input from the gurus on OCN would be greatly appriciated . And sorry for the extra crazy long post.

Thanks!

Tyler
post #2 of 5
post #2 here

http://forums.guru3d.com/showthread.php?t=338102

post #8 here

It won't unlock the voltages but lifts the limits on the clocks

I had to do this way cuz I have a non ref 6950, solid OC at 945/1440 playing BBC2 for hours.

If you want the shaders then swap ur bios unless you're locked in like me.
simple stuff
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Intel SB 2500k @ 4.5GHz MSI P67A-GD55 MSI TFII 6950 2GB @945/1415 2x4GB DDR3 1333MHz 
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Seagate 1tb Windows 7 64bit Viewsonic VX2450 LED Corsair GS600 
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CM HAF 922 
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simple stuff
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel SB 2500k @ 4.5GHz MSI P67A-GD55 MSI TFII 6950 2GB @945/1415 2x4GB DDR3 1333MHz 
Hard DriveOSMonitorPower
Seagate 1tb Windows 7 64bit Viewsonic VX2450 LED Corsair GS600 
Case
CM HAF 922 
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post #3 of 5
Thread Starter 
Dude thank you! You rock. I totally should have read the changelog (I ALWAYS read changelogs lol). Thanks for not yelling at me also haha.

So so far we don't really have a way to up our voltages on these cards huh? Are you getting a stable OC on 1.1v? Good news if you are, lower voltage always makes me happy
post #4 of 5
huh, no software voltage control on these cards?

Quote:
Originally Posted by jsigone View Post

I had to do this way cuz I have a non ref 6950, solid OC at 945/1440 playing BBC2 for hours.

If you want the shaders then swap ur bios unless you're locked in like me.
is that with stock volts?
Silent But Deadly
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Silent But Deadly
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3570k @4.4 Gigabyte Z77X-UD3H Powercolor AMD 470 8GB Samsung 
Hard DriveCoolingCoolingOS
Cricual M4 64 / WD6400AAKS Silver Arrow SB-E Arctic Cooling 7970 7 64 Ultimate 
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post #5 of 5
yah stock volts (I can't control them anyways) I read that the non ref cards have higher volts from the factory then ref cards so allow for better overclocking out of the box. I tweeked the tune a bit and backed off to 940/1440 as I got lock up in BBC2. Haven't had another issue since.

http://www.techpowerup.com/reviews/M...ozr_II/31.html
simple stuff
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel SB 2500k @ 4.5GHz MSI P67A-GD55 MSI TFII 6950 2GB @945/1415 2x4GB DDR3 1333MHz 
Hard DriveOSMonitorPower
Seagate 1tb Windows 7 64bit Viewsonic VX2450 LED Corsair GS600 
Case
CM HAF 922 
  hide details  
Reply
simple stuff
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel SB 2500k @ 4.5GHz MSI P67A-GD55 MSI TFII 6950 2GB @945/1415 2x4GB DDR3 1333MHz 
Hard DriveOSMonitorPower
Seagate 1tb Windows 7 64bit Viewsonic VX2450 LED Corsair GS600 
Case
CM HAF 922 
  hide details  
Reply
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