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Help OCing HD6970

post #1 of 13
Thread Starter 
Hey everyone smile.gif I've got an Powercolor Radeon HD6970 reference card and I'm about to OC it using MSI AB or Overdrive

the max settings for this card are
950 Core
1450 Mem
+20% Power

It isn't stable at this it crashes during benchmarking/stress testing


Also does anyone have like the optimal settings for CCC that gives best performance (but obviously the least amount of graphical reduction)

Thanks biggrin.gif
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post #2 of 13
Well my 6970 is at 920 and 1400 clock speeds currently. This is the highest i can go and be stable without voltage adjustments but remember every card is different.

I would recommend using MSI Afterburner instead of CCC for any overclocking. You can then set a custom fan curve for optimal cooling for your gpu and make voltage adjustments so that you can reach the 950 core speed. You can go much higher than 950 core in MSI Afterburner also but you may require better cooling for that.

Don't exceed 1.25v and you should be fine providing you make your fan curve well. I need 1.23v for my card to be stable at 950 which does get quite hot hence the reason i am only on stock voltages now.

Be sure to monitor your temps using something like GPU-z. You will see that there are actually 5 temperature readings for your GPU to look out for. I recently found out that Temp #2 on my card was about 10c higher than the other parts of my gpu and i fixed this by reapplying the thermal compound. (This was due to a poor factory application, you hopefully won't have any problems).

Good luck thumb.gif
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post #3 of 13
Thread Starter 
Thanks heaps that was so helpful!

I can get stable at either 950/1400 or 940/1415 with stock temp of 1.175V with Max Temps of 71C after 100% load and it only peaks there for a second.

Is this good or is that a bit too high temp? That's with auto adjusting fan settings
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post #4 of 13
That's fine. It's when you start getting to the 80's you should think about increasing your fan speed. Seems you have quite a reasonable card there. Also i think Powercolor must have a more aggressive default fan curve as my card will go well into the high 80's at 100% load and the fan will sit at under 35%. Madness!
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post #5 of 13
Thread Starter 
I got it full stable at 950/1450 with 1.2V smile.gif max temp of 72C
Thanks smile.gif

Is there any settings in CCC I should change? or that are even worth changing?
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post #6 of 13
I have unticked Enable Graphics OverDrive so that it does not interfere with Afterburner. Seems to work fine like that. Everything is default basically.

Your Welcome biggrin.gif
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post #7 of 13
Quote:
Originally Posted by chalamah View Post

That's fine. It's when you start getting to the 80's you should think about increasing your fan speed. Seems you have quite a reasonable card there. Also i think Powercolor must have a more aggressive default fan curve as my card will go well into the high 80's at 100% load and the fan will sit at under 35%. Madness!

Fan is controlled by the driver so it doesn't matter what it's set at in the bios.


OP, since you have it working its fine to stay put.


If you have a real reference card with bios switch, the best method for overclocking is Overdrive, using RBE to set voltages, Racerx to unlock Overdrive.
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post #8 of 13
Quote:
Originally Posted by tsm106 View Post

Fan is controlled by the driver so it doesn't matter what it's set at in the bios.

Hmmm interesting. What are you using to test for stability Rolley? I would be interested to know what your temps are after 10 mins in Kombuster. (Thats the MSI Afterburner stress test).
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post #9 of 13
Thread Starter 
I was using Kombuster but didn't run for 10mins. I'll do that now I'll run 10min stress test and post results smile.gif

Edit. Which exact test should I use?
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My System
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CPUMotherboardGraphicsRAM
Intel i7 860 2.80Ghz @ 4.0Ghz Gigabyte P55-UD3R Gigabyte ATI Radeon 6970 2GB 8GB G.Skill RipJaws 2000Mhz 
Hard DriveHard DriveCoolingOS
Intel 120GB 520 SSD Seagate Barracuda 2TB Corsair H100 with 4x Gelid Wings Windows 7 Ultimate 64-Bit 
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post #10 of 13
Thread Starter 
It peaks at 81C and every few times it crashes between 6-10min but some times it stays fine. What should I do? My Voltage is 1.22V and max fan % is 36% Isn't that a bit low?
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 860 2.80Ghz @ 4.0Ghz Gigabyte P55-UD3R Gigabyte ATI Radeon 6970 2GB 8GB G.Skill RipJaws 2000Mhz 
Hard DriveHard DriveCoolingOS
Intel 120GB 520 SSD Seagate Barracuda 2TB Corsair H100 with 4x Gelid Wings Windows 7 Ultimate 64-Bit 
KeyboardPowerCaseMouse
Razer Lycosa OCZ 850W Corsair 650D Razer DeathAdder 
Mouse Pad
SteelSeries Qck+ Mini 
  hide details  
Reply
My System
(15 items)
 
  
CPUMotherboardGraphicsRAM
Intel i7 860 2.80Ghz @ 4.0Ghz Gigabyte P55-UD3R Gigabyte ATI Radeon 6970 2GB 8GB G.Skill RipJaws 2000Mhz 
Hard DriveHard DriveCoolingOS
Intel 120GB 520 SSD Seagate Barracuda 2TB Corsair H100 with 4x Gelid Wings Windows 7 Ultimate 64-Bit 
KeyboardPowerCaseMouse
Razer Lycosa OCZ 850W Corsair 650D Razer DeathAdder 
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SteelSeries Qck+ Mini 
  hide details  
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