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69xx What's your max overclock? - Page 17

post #161 of 209
Quote:
Originally Posted by Mudfrog View Post
No clue how accurate it is but I read a review on newegg addressing the issue as someone was complaining about it. Supposedly if the RAM is not at a stable speed it will automatically reduce it's speed to get it stable. Makes sense but I do not know if it's true.
Since 5xxx, AMD cards will re-render bad frames until they are clean. At a certain point the card will get saturated with bad frames and slow down. You need to verify what that limit is with each individual card thru benches.
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post #162 of 209
Quote:
Originally Posted by Mudfrog View Post
No clue how accurate it is but I read a review on newegg addressing the issue as someone was complaining about it. Supposedly if the RAM is not at a stable speed it will automatically reduce it's speed to get it stable. Makes sense but I do not know if it's true.
Well I saw the graph at a constant 1400 in afterburner, so you think that would have reflected a drop in speed.
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post #163 of 209
XFX 6950s in crossfire w/ shaders unlocked

1015MHz core, 1300MHz memory (one of my cards doesn't like higher RAM frequencies).

1.3V
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post #164 of 209
Quote:
Originally Posted by Exostenza View Post
Well I saw the graph at a constant 1400 in afterburner, so you think that would have reflected a drop in speed.
As you noticed they don't drop in speed and instead slow down because they are saturated with bad frames.
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post #165 of 209
So whats a good OC on air? I'm currently at 950 / 1400 (messed around at lunch), played for about 20 min with no issues but haven't done enough to feel comfortable with it yet. So far so good though, this is with a 1.2 vcore.

With temps at 70 under load (fan at 100%) how much further should I push it? I imagine 1000 on air is not very obtainable.
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post #166 of 209
Quote:
Originally Posted by Mudfrog View Post
So whats a good OC on air? I'm currently at 950 / 1400 (messed around at lunch), played for about 20 min with no issues but haven't done enough to feel comfortable with it yet. So far so good though, this is with a 1.2 vcore.

With temps at 70 under load (fan at 100%) how much further should I push it? I imagine 1000 on air is not very obtainable.
Fans at 100%?!? Reference 6950? That's got to be loud as can be. For my 1GHz benches, I manually set the fan to 80% and temps were 50-60C. For 24/7 I shoot for ~50% fan speed with a custom profile.
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post #167 of 209
Quote:
Originally Posted by compudaze View Post
Fans at 100%?!? Reference 6950? That's got to be loud as can be. For my 1GHz benches, I manually set the fan to 80% and temps were 50-60C. For 24/7 I shoot for ~50% fan speed with a custom profile.
Nah.. I have the XFX 6950 1GB w/ dual fans. The 4890 I had did have the reference fan and the 6950 at 100% is quieter than the 4890 at 40%.

The reference style moves a lot more air than this style, but the quietness makes it ok.
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post #168 of 209
Unlocked HD6950.

Core running @900 MHz
Mem running @1375 MHz.

Want to go higher, but I can't modify my voltage...
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post #169 of 209
Quote:
Originally Posted by AMD/ATI View Post
Unlocked HD6950.

Core running @900 MHz
Mem running @1375 MHz.

Want to go higher, but I can't modify my voltage...
Why cant you?
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post #170 of 209
Im fed up with trying to take my card higher , crashed so many times .. i just cant get this thing stable past 880/1375 . I read threads everyday about people hitting 950 on stock voltage or 1Ghz on 1.3v .. not the case for me , i can run 950 for a minute on 1.3v and it just crashes ... 910/1400 on 1.250v crashes .. everything crashes except 880/1375!!!!

I really want to upgrade from this card .. dissapointed i cant overclock it past 900mhz yet everyone else can do 950 easily .

Must of got one from a crap batch or something , though it was one of the first 6950's in stock here in aus .. unlocked easily to 6970 but thats its limit ... Some games im lucky to stay stable at say 930 but in another it will crash .
Edited by Xristo - 3/17/11 at 2:18pm
    
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