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HD 6870 oc

post #1 of 29
Thread Starter 
Hi. i have oc my 6870 card to 940 Mhz clock speed from 900
and memory to 1100 from 1050 Mhz , its looking fine at 76c 55 fan speed but i dont know if i need any voltage adjustment up or down , what do you advice ?
thank you .
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spirit-crusher
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post #2 of 29
Should be fine I'm running at 950 and 1150 stable with no voltage adjustments. Those temps seem a little warm for 55% fan speed though.

I run my cards at 55 fan speed and even the top card that's blocked doesn't usually go over 68.
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post #3 of 29
940 / 1140 @ 35%

works great
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post #4 of 29
970 / 1180 stock voltage, fan at 30% , didnt see a temp rise above 60c yet. 34c idle
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post #5 of 29
1000/1150 under load fan goes to 35-40% and 76c
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post #6 of 29
Thread Starter 
am talking about kombustor test . on normal use i need 50% fan speed to keep it
under 70c and 55% to keep it under 80c with combustor
i am using power color card not the factory oced one . maybe u guys have better
heat sink . or there is somthing wrong am doing ?

btw what is the max idle temp recommended ? i run my sys 24/7 so am trying
to rest my fan at 25% when that is 40c i can get 37c at 30% fan speed .
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post #7 of 29
I'm using 2 XFX 6870's with stock heatsinks.

I have the fans set at 30% for normal use. The top primary card usually idles at 38-40.

50% with a 100 load while gaming usually is 68-70 for the top primary and 62-4 for the bottom secondary. Raising the primary card to 55% results in 66-68.

I don't think the xfx cards cool quite as well as some of the other reference cards.
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post #8 of 29
Thread Starter 
Quote:
Originally Posted by cavallino View Post

I run my cards at 55 fan speed and even the top card that's blocked doesn't usually go over 68.
i get 68c on 50% fan speed but not with combustor . so am sorry not to have told the name of the test

lol i tested this fan at 65% speed and i felt like its gonna left off with my case on it
Edited by prescient - 2/20/11 at 10:42am
spirit-crusher
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spirit-crusher
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post #9 of 29
Thread Starter 
hi i have oced my card from 900 mhz 1050 to 940 mhz 1100

and i made a good manual fan profile , problem is i cant save it to profiles
only the core oc saved . so it only works as its set but when i close down
after burner ati overdrive shows the fan is back to its stock speeds .
were am i going wrong ? or what button should i push ? thanks
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post #10 of 29
1000/1200 @ 1.3v on both my 6870s. Max temp @ load is 75c with fan speed set at 50%
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