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GTX 570 - core clock barrier?

post #1 of 9
Thread Starter 
I am not exactly sure what is going on. my card is stable at 910/1820/2200
when i bring the core to 920 my computer blue screens and shuts down during Tessmark.

my volts were 1.088 when i tried it the first time, since 910 core is stable there, so after the blue screen I thought, "...***?" and raised the voltage to 1.1v. it also blue screened there.
What is going on?

this is my second GTX 570. my first one was a GIGABYTE. it didn't overclock well at all. without raising the voltage cap I couldn't get it stable at more than 840MHz core. I raised the voltage cap of that one to 1.2v. I finally got it stable at 1.188v with the core at 880 MHz. When I did I started getting a blue screen every time I ran tessmark, just like now. After a few days, my card broke. then I bought EVGA and have wayy better OC'ing.

Thanks to the experiment of having another gtx 570, I'm pretty sure the high voltage isn't what killed my old card, IF these two cases are related. It seems that gtx 570's have a clear barrier on their core clocks, because my old card was fine just 10 MHz below 880 as well.

This blue screen only happens during Tessmark. both cards were stable playing crysis for 2+ hours and other benchmarks.

it seems no matter how high the volts are raised I'll still get a blue screen.

So my question is, does anyone else have a different explanation? and has anyone else experienced a core clock barrier?

and tell me if I'm just a freakin noob idiot who doesn't know what he's doing. so I can learn. wink.gif
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post #2 of 9
What kind of temps are you getting when running Tessmark? You should be using the highest fan speed you can bear, because you will want temps as low as possible. Sounds to me like the VRMs are overheating, because i had similar issues with my GTX 470 where it wouldn't go over 865MHz core with any amount of voltage. If you havent already, try running it with maximum fan speed. You could also try giving a bit more than 1.1v because sometimes even the next level up doesn't mean it will certainly be stable
    
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post #3 of 9
Thread Starter 
74C max. my old card got 76C max. If my VRMs are overheating I don't understand why this card can only handle 1.088v and my old card could handle so much more without this happening.


From what I've seen, this card should easily be able to handle 1.088v without the VRMs getting too hot.
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post #4 of 9
Quote:
Originally Posted by Jae Tao View Post
74C max. my old card got 76C max. If my VRMs are overheating I don't understand why this card can only handle 1.088v and my old card could handle so much more without this happening.


From what I've seen, this card should easily be able to handle 1.088v without the VRMs getting too hot.
All components can be different. You should also remember the higher you go, the more voltage you would need for a small(er) increase in clocks. Try giving 1.112/25 just to be sure it's not the voltage holding you back. You may wanna lower your memory clocks to stock too and concentrate on the core first.
    
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post #5 of 9
Thread Starter 
I will try the higher volts. I want to see more input first though. I don't want to try it if it may kill my card. I already destroyed one. wink.gif

I've never had a blue screen when a card is unstable. the driver crashes and it recovers most often. I didn't start getting blue screens until I tried the 920MHz core. before that just a driver crash and recover.
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post #6 of 9
Thread Starter 
volts at 1.112 and 1.125.

blue screen.
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post #7 of 9
Probably the VRMs on the card, though i never had BSODs just crashes on mine. Maybe the card doesn't wanna go above 910.
    
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post #8 of 9
Thread Starter 
I'm thinkin the card doesn't wanna go above 910. I haven't heard of anyone with a VRM overheat problem at only 1.088v. According to every 570 thread I've seen, up to 1.15v should be safe with stock cooling, but its suggested that you don't do exactly 1.15v, and that you stay below it.

and my old GIGABYTE card didn't want to go above 870MHz. but why would the card die if its not overheat?
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post #9 of 9
Quote:
Originally Posted by Jae Tao View Post
I'm thinkin the card doesn't wanna go above 910. I haven't heard of anyone with a VRM overheat problem at only 1.088v. According to every 570 thread I've seen, up to 1.15v should be safe with stock cooling, but its suggested that you don't do exactly 1.15v, and that you stay below it.

and my old GIGABYTE card didn't want to go above 870MHz. but why would the card die if its not overheat?
Some component probably died.
    
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