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How to: 680 overclocking fundamentals - Page 2

post #11 of 125
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Quote:
Originally Posted by jacedaface View Post

One thing, if you set the power to 132% and it only used 85% power to reach those clocks wouldnt that create the same heat as having it set to 85% power.
Isn't that the point in the in it adapting? Although your saying you can use 132% if you want, the card is only using 85% and therefore only creating 85% of the heat.
I must admit i havent started monitoring the power yet, but in Heaven 3.0 with my core set at +200 (1337) and +500 Memory. My temp seemed to max at 58C and it never once downclocked the card. I will have to run it again and add the power to the OSD.

With the power set to 132%, my card would draw between 100-105% to get those clocks. When I restricted it to 85%, it was pretty much pinned at 85% the entire time (obviously), but the clocks were the same thumb.gif

58'C sounds incredibly cool for that overclock, I'd reckon something was wrong >.>;
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post #12 of 125
Question: I have the power setting at stock (100) - should it be able to go over stock power settings without any offset. I ask because running 3DMk11 and Heaven benchmarks at stock settings and I am getting the results below. These numbers changed between stock and manual fan curve settings as I would expect. Now, I know the card is dynamic, but nowhere have I read or seen where the power settings is dynamic without creating a manual offset. I know the Core Clock is dynamic and that's build into the stock settings, but I have not seen this for the Power settings. Does anyone have any insight on this? What's your thoughts? I'm going to see what Evga or Nvidia has to say about this.

Thanks...Al

Custom fan curve settings results:

3DMark:
GPU1 = 117
GPU2 = 113

Heaven
GPU1 = 102
GPU2 = 96
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post #13 of 125
A good fan curve is 1% for every 1C.
     
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post #14 of 125
Nice comprehensive guide.thumb.gif
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post #15 of 125
Quote:
Originally Posted by Arizonian View Post

I'm crashing anything over +100 / +100 / +200 - either my fan settings are wrong or I just ended up with a bad over clocker.
Can some one getting good OC post your fan curve numbers?
30C -40%
40C -55%
50C -70%
60C -100%
70C -100%
80C -100%
90C -100%
Copy n paste that grid fill in the percentage. smile.gif

on my 580 i go like this, before i did that i couldn't even run 1MHz over stock
post #16 of 125
Quote:
Originally Posted by zdude View Post

on my 580 i go like this, before i did that i couldn't even run 1MHz over stock

Yeah I had a great fan curve for the 580. Ran my 580 @ 900Mhz 24/7. I had an aggressive curve.

The 680 is so different. It seems fickle where too much fan at the wrong moment crashes. It's almost polar and needs a finess balance.
     
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post #17 of 125
Thanks. +Rep
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post #18 of 125
Now the question is, why does not power target work in Afterburner?
post #19 of 125
Quote:
Originally Posted by Celeras View Post

With the power set to 132%, my card would draw between 100-105% to get those clocks. When I restricted it to 85%, it was pretty much pinned at 85% the entire time (obviously), but the clocks were the same thumb.gif
58'C sounds incredibly cool for that overclock, I'd reckon something was wrong >.>;

lol, to be fair when i say the temp seemed to max out at 58C, that was after about 20mins of Heaven 3.0 and it seemed to flash back and forth between 57c-58c.
My max ambient is probly 18C and i have the fan fixed at 85%, also have crazy airflow in my case. Just below my cards intake is a 120mm/below and to the right a 120mm/to the right a 120mm/and above the intake a 230mm side intake. Plus another intake, plus plush/pull cpu fans, plus two exhaust fans.
Yes its pretty loud. lol

I havent done any hard core gaming for long periods of time yet so dont know if that is my max temp. I.E i havent played BF3... Yet.
The only games ive had on since i got the card only use about 40-50% power at stock settings and stay below 40C.
Plus i see no point in gaming above 60fps so always have target frame rate. I am trying to work out if target frame rate, vsync or adaptive is best at the minute.

338
Edited by jacedaface - 4/1/12 at 1:29pm
    
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post #20 of 125
Great post OP. Very informative.
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