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Strange overclock 6970 issue

post #1 of 10
Thread Starter 
Hello everyone

I am experiencing a strange problem here

Recently i bought from a dude an HD 6970. According to his screenshots he could get to 980 core without voltage increase. I have to say that i bought the gpu for 260 Euros and the accelero was included so i didn't pay extra bucks for the fact that it was extremely overclockable.

So i tried it out myself and i found out that not only i can't reach 980 without changing the voltage but for the moment my limit is 970 with 1265 V. Memory behaves good enough and i reach 1500 easily. Problem with core is that drivers crash if i get over 970

Never had that issue before and i can't really understand why the crash. I had a 4890 before usually i used to get artifacts before crashing. Now i just crash and i don't have artifacts.. From what i ve noted drivers tend to crash when there is a gpu usage spike ex. from 30-40% to 100%. I ve tried everything from driver sweeper cc cleaner and stuff like that but nothing actually changed

This guy told me that gpu overclock is hardware based. I am not really sure if that is true or not. I am actually 99% sure that this a stupidity but you know there is always that 1% doubt.... Obviously with hardware i don't intend psu (i have a good one anyways) but mobo and processor.

Max temps with accelero are around 60c so it's not an overheating problem

From what i ve seen though the Catalyst Center is completely ****ed up due to the fact that i use Trixx or Msi Afterburner. I seriously don't know what to do. Limit on CC is 950 maybe this is causing problems? Obviously it's disabled but with Ati drivers there is always something to worry about.

Then again everyone reaches 1000ghz and i can't reach it even with 1.3V

Doh any suggestions would be helpfull

Thanks biggrin.gif
post #2 of 10
Crashing means your OC isn't stable, and it doesn't have to get artifact before it crashes also. Did that guy send you his stability test screenshot as well at 980 Core, or just screenshot of the MSI Afterburner? I can put my 6970 at 1GHz on stock V as well but it doesn't mean it's stable. It's hardware based, different cards have different OC limit. Also if you could fill out your System Detail (in your User CP), it would be easier for us to help. What is your PSU?
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post #3 of 10
Thread Starter 
Quote:
Originally Posted by Ocnewb;13513975 
Crashing means your OC isn't stable, and it doesn't have to get artifact before it crashes also. Did that guy send you his stability test screenshot as well at 980 Core, or just screenshot of the MSI Afterburner? I can put my 6970 at 1GHz on stock V as well but it doesn't mean it's stable. It's hardware based, different cards have different OC limit. Also if you could fill out your System Detail (in your User CP), it would be easier for us to help. What is your PSU?

Psu is revolution85+ 1250w

Mobo is a P5E and i am gonna try it out on a rampage formula tomorrow

Ram is PC8800 Gskill Pi series

Processor is Q6600 at 3.6 Ghz


From what i ve seen he did a 3d Mark 11 and that's it

I know it's not much but if i do a 3d mark 11 with 980 without changing volts i ll crash on the first screen biggrin.gif

Edit :No 3d Mark 11 just an unigine benchmark

http://www.xtremeshack.com/immagine/i87378_unigine-bench-2.1-980-1500-1.175.jpg
Edited by woNd3R - 5/15/11 at 12:27pm
post #4 of 10
Thread Starter 
No love for me? biggrin.gif
post #5 of 10
Quote:
Originally Posted by woNd3R;13522433 
No love for me? biggrin.gif

The dude you bought from could have burned the card up to the point the gpu degraded by maxing pc and voltage over a long period. Not likely, but possible. I had some weird issues when I enabled powertune in ccc to add the extra 20 percent. I have since disabled The overclock section totally in ccc. You already did this, right? I'm assuming this is a reference card with an aftermarket cooler? Do you have the 8 pin and the 6 pin securely plugged in? Run gpu-z while overclocking and watch all the gpu temps. The 2nd and third gpu temps are the vrm temps. It could be this guy did a bad job installing the accelero and didn't get the heatsinks on the vrms properly. The vrm temps shouldn't be much higher than the core. Definitely not over 85.

It could be your system is just not up to the task. If 980 was the limit on the other guys machine and 970 is the limit on your machine, that just is what it is.
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post #6 of 10
Thread Starter 
Quote:
Originally Posted by breenemeister;13523312 
The dude you bought from could have burned the card up to the point the gpu degraded by maxing pc and voltage over a long period. Not likely, but possible. I had some weird issues when I enabled powertune in ccc to add the extra 20 percent. I have since disabled The overclock section totally in ccc. You already did this, right? I'm assuming this is a reference card with an aftermarket cooler? Do you have the 8 pin and the 6 pin securely plugged in? Run gpu-z while overclocking and watch all the gpu temps. The 2nd and third gpu temps are the vrm temps. It could be this guy did a bad job installing the accelero and didn't get the heatsinks on the vrms properly. The vrm temps shouldn't be much higher than the core. Definitely not over 85.

It could be your system is just not up to the task. If 980 was the limit on the other guys machine and 970 is the limit on your machine, that just is what it is.


He actually got to 980 without voltage increase and that's the most incredible part

Thinking of it he was using an hdmi cable and i use a normal one..

The vrm temps are good i already checked that out, tried with lower drivers as well but still nothing changed

Everything is installed correctly but anyways one of these days i am gonna try out the gpu on a friend's system to see if anything changes
post #7 of 10
Quote:
Originally Posted by woNd3R;13528447 
He actually got to 980 without voltage increase and that's the most incredible part

Thinking of it he was using an hdmi cable and i use a normal one..

The vrm temps are good i already checked that out, tried with lower drivers as well but still nothing changed

Everything is installed correctly but anyways one of these days i am gonna try out the gpu on a friend's system to see if anything changes

My first sapphire card would run gpu tool and kombustor at 980/1500 on stock volts, but games would crash it pretty quick. A screenshot of 980 @ idle is nothing. Based on the screenshot you provided, that's what the seller was doing. The temperature was 33. No way he was benchmarking or playing a game. Idle clocks really don't mean much. Besides, the card clocks down to 250 in 2d mode. You don't necessarily have a bad card, you just don't have a lot of oc room on the core.

Memory is the limiting factor on my lightning. I recommend to drop the memory back to 1375 and see what the core can do. Sometumes you can get awesome core and memory overclocks, just not at the same time.
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post #8 of 10
As Breen noted, I could crank my 6970 to absurd numbers and screen shot gpz but try those same numbers in actual testing it would crash within seconds. As he also pointed out those temps in the 30's, huge indicator that that card was 2D and sitting at idle. There are several reviews that show these cards OC'ed gaining 2-4 fps. Hardly worth the wear on the components to gain that little.
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post #9 of 10
sry to tell you but he prob lied bro sry frown.gif Mine def will not do that speed at stock voltage.
post #10 of 10
Thread Starter 
Thanks guys for your replies

I thought i was doing something wrong but i understood that either he had a lucky strike on 3d mark 11 either he lied.

Anyway i found 960 - 1500 with 1.220 V to be the best setup. Above the gpu gets stressed a lot. While testing i saw that i can't reach 1000 core even with 1350 of memory, on the other hand i can reach 1550 memory :>
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