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Stable benchmarking OC?

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#1
I'm looking for a stable OC for benchmarking. I can't get the Fur stability test to run at anything other than stock. Any tips are welcomed.
 
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#2
Have you tried running the CCC overdrive?
Do you have your fans running at stock speeds?
The HD 4850 gets VERY hot at stock fan speeds (60-80*)
 
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#3
I use CCC and that sets it, but it doesn't seem stable. I have my fan wide open. I think I have a driver problem because it is also shutting off at stock clocks doing the benchmark and my 3D screen saver.
 
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#4
Can I have your temps @ idle/stressed?
If you haven't done so, change your fan speeds:
In Windows Xp go to:
C:\Documents and Settings\(Your User Name)\Local Settings\Application Data\ATI\ACE
or in Vista
C:\Users\(User Name)\AppData\Local\ATI\ACE

and right-click a profile and hit "Edit"

find:
<Feature name="FanSpeedProtocol_0">
<Property name="FanSpeedProtocolProperty" value="Percent" />
</Feature>
<Feature name="FanSpeedAlgorithm_0">
<Property name="FanSpeedAlgorithm" value="Automatic" />
</Feature>
<Feature name="FanSpeedRPMTarget_0">
<Property name="Want" value="0" />
</Feature>
<Feature name="FanSpeedPercentTarget_0">
<Property name="Want" value="25" />

And make it

<Feature name="FanSpeedProtocol_0">
<Property name="FanSpeedProtocolProperty" value="Percent" />
</Feature>
<Feature name="FanSpeedAlgorithm_0">
<Property name="FanSpeedAlgorithm" value="Manual" />
</Feature>
<Feature name="FanSpeedRPMTarget_0">
<Property name="Want" value="0" />
</Feature>
<Feature name="FanSpeedPercentTarget_0">
<Property name="Want" value="100" />

and now test it out. Then you can lower the
<Property name="Want" value="100" />
to any number from 0-100 untill you find a noise/performance compromise :)
~Evangeline
 
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#5
Furmark will really heat up your card. Try running GPU-z while running furmark and look at the temps from GPU-z.

I've had one of my HD4870s oced stable in all the games i play, but it crashes after afew mins of furmark. It normally gets +20C hotter running furmark compared to gaming :/
 
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#6
So as long as it's stable for gaming, I should be good to go?
 
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#7
So as long as it's stable for gaming, I should be good to go?
If you wanna just game, then yes.
But make sure it is STABLE gaming.
5 hours of an OC'd HD 4850 playing crysis crashed on me
</3
 
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#8
That's good. Stock cooler?
 
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#9
yea,
my temps were very low in the 40's
but i was OC'd at 800/1175
 
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#10
yea,
my temps were very low in the 40's
but i was OC'd at 800/1175
Geez 800 core on a 4850? That must really put alot of strain on the VRMs. My 4870's VRMs hit 100C+ at 800MHz and draws 70+ amps according to GPU-z...I dunno if i want to push it any farther even tho the main GPU temp is only in the 40C range.

 
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#11
Geez 800 core on a 4850? That must really put alot of strain on the VRMs. My 4870's VRMs hit 100C+ at 800MHz and draws 70+ amps according to GPU-z...I dunno if i want to push it any farther even tho the main GPU temp is only in the 40C range.

yea, I don't wanna fry them, I'm trying to sell them lo,