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6970 problems with oc?

post #1 of 9
Thread Starter 
I have a Sapphire non reference 6970 with no dual bios and different shroud. It is hard to get a stable overclock above 950/1450 power increased to 50% (mine goes up to 50 as opposed to 20) I also have to apply 1.235v (not sure if afterburner is actually raising it though due to sensor reading in gpuz) in order to stay stable at those clocks. I tried 2 different 6950s and they would not oc past the bios unlock. Is this normal? A lot of ppl are going up and to and past 1000/1500 I don't think I got 3 crappy gpus that don't oc well. I have a 700watt psu.
http://computerrack.ca/wecs.php?stor...&target=ACE700
I had no trouble ocing my 5850's and my i5 is oced to 4.0 stable cpuz reads 1.36volt idle. I tried ocing my 9670 with the cpu at 3.2 but it was still not stable past 950/1450

Anyone have any suggestions?
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post #2 of 9
have you increased voltage?
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post #3 of 9
Thread Starter 
Yes. In afterburner to 1.235 with force constant voltage turned off and power control in ccc to 50%
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post #4 of 9
Just so you know, those with 1000+ got either aftermarket cooling or high stock cooling fanspeed.
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post #5 of 9
Turn up fan speed to 80 percent
volts to 1.3v +

see if its stable
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post #6 of 9
Thread Starter 
I will try that in a couple of hours. That fan is so loud at 80! girlfriend is trying to study in the office. I can hear her asking me what the hell is wrong with my comp lol
I think I had my temps below 75 and fan at 70 while I tried my oc but I am willing to try again
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CPUMotherboardGraphicsRAM
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post #7 of 9
Thread Starter 
I measure my stabilty with kombuster, heaven and vantage. If I get ctd in bc2 then it is not stable.
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My System
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CPUMotherboardGraphicsRAM
i7 2600k @ 5ghz p67 Sabertooth  gigabyte 780 G. SKILL TridentX Series 2133ghz 
Hard DriveOSMonitorKeyboard
Corsair Force 3 120gig win7 64bit benq 27"X3 eyefinity Logitech G13 
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post #8 of 9
May be you should cool her down first
I7 970 AT 4 GH
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I7 970 AT 4 GH
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post #9 of 9
Thread Starter 
Yeah I figured it was a heat issue. I suspected my gpu memory was getting to hot so I turned my h50 radiator fan to blow outside, it was originally blowing the hot air inside the case. I have a 200mm fan on top to suck out most of the heat. I needed the cold air from outside to cool it because I had a asus 5850 cooler that blew the air all over inside and over heated my i5 4.0ghz oc. Now with the 6970 blowing outside my temps are better and no more hot cpu air blowing on the gpu and probably overheating the memory. If i5 is at 3.6ghz I get 950/1520 stable at 1.235v. The gpu core won't seem to budge
My System
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CPUMotherboardGraphicsRAM
i7 2600k @ 5ghz p67 Sabertooth  gigabyte 780 G. SKILL TridentX Series 2133ghz 
Hard DriveOSMonitorKeyboard
Corsair Force 3 120gig win7 64bit benq 27"X3 eyefinity Logitech G13 
PowerCaseMouse
Silverstone gold series 750w Corsair 650d Vengeance M60  
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
i7 2600k @ 5ghz p67 Sabertooth  gigabyte 780 G. SKILL TridentX Series 2133ghz 
Hard DriveOSMonitorKeyboard
Corsair Force 3 120gig win7 64bit benq 27"X3 eyefinity Logitech G13 
PowerCaseMouse
Silverstone gold series 750w Corsair 650d Vengeance M60  
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