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6850 overlocking

Quick question, enabled the 1000/1250 overclock using the catalyst control centre and is this alright? Will it change voltages automatically as it does not have voltage control tab?

I assume this is all ATI will safely let me do, possibly on stock voltages and the afterburner allows more volts to go beyond these limits?
 
I'm using the afterburner beta where you can access voltage.

Mine was stable at 1000/1250 on 1218 volts through afterburner

Tried 1000/1250 in the ccc but it didn't like it, needs some extra juice but not much.

However, I have mine ste at 925/1150 in the ccc with no additional voltage increase and so far no problems
 
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^ thats a very nice clock. :)
I cant really get above 975 on the core even with 1225 volts, and memory seems to be around 150ish max.

Mainly game at 974/1076 at 1200volts - should be able to lower this a bit, but im happy with temps atmo
 
Are you able to overclock on any brand of card? I have a Powercolor on the way, but the MSI site seems to mention stuff only about controlling voltages on MSI Nvidia cards.
 
RaV said:
^ thats a very nice clock. :)
I cant really get above 975 on the core even with 1225 volts, and memory seems to be around 150ish max.

Mainly game at 974/1076 at 1200volts - should be able to lower this a bit, but im happy with temps atmo
Click to expand...

What temps are you getting?

Mine is idling at approx 30c but with the overclock and after several hours gaming this seems to hit 62c. Not seen it go higher yet. Fan stays really low too. Can't fault the Asus cucore hsf.
 
Idle is normally around 37. But my case isnt amazingly aired. and max is normally mid 70's. But that seems right.- Ive just tried and I cant get 975 out of the core without a voltage of 1220.

So your OC on stock voltage is pretty damn impressive! :)
 
Hey Rav

What results you getting at the moment? Wonder if theres much in it (Performance wise) between my current 950/1150 and going for higher clock and more voltage??
 
My current max stable is 974 and 1150 at 1220 mV's

Theres probably not much in it really. have been playing Metro 2033 a lot recently, so compared that with stock and the difference isnt that much. I wont be trying to get any higher cause it gets a bit noisier after 1220 mV's ;) and Im happy enough with the balance atmo

Options: Resolution: 1680 x 1050; DirectX: DirectX 11; Quality: High; Antialiasing: AAA; Texture filtering: AF 4X; Advanced PhysX: Disabled; Tesselation: Enabled; DOF: Disabled

Stock:
* Average Framerate: 46.00
* Max. Framerate: 99.60
* Min. Framerate: 5.21

975/1150
* Average Framerate: 49.50
* Max. Framerate: 115.73
* Min. Framerate: 5.37

Heres hoping the next batchs of drivers are kind on the 6850s and 70's ;)
 
And im not sure about metro, I know its pretty demanding all round. maybe it wants more than my 3.3Ghz Q6600? dont know. ;)

On the same OC's in the Uniqine heaven benchmark:

Stock
FPS: 30.0
Scores: 755
Min FPS: 14.4
Max FPS: 69.9

OC
FPS: 35.7
Scores: 900
Min FPS: 15.6
Max FPS: 83.0

I mean its not very dramatic, but it did help in metro to keep everything nice and playable. I mean every frame per second when your getting less that 60 does help, but i was getting 50-70s while playing. so im happy enough to turn on the OC for the odd game that needs it. I dont have the overclock set on boot
 
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I'm using standard clocks for most things due to the voltage issue mentioned above. But it takes like 5 seconds to ramp the card up to higher speeds when a game requires it.

Although every benchmark is different, I'm finding a 25% increase in speed in GPU limited scenarious and games so I think the overclock can be well worth it!
 
welshdragon said:
Right just had a bash and stable at 1000 core 1150 mem on 1218 volts.

Gaming for an hour on that the temp hit 66c so I hope thats not too high??
Click to expand...

That's well low - anything below 85C is fine.

welshdragon said:
Quick question, enabled the 1000/1250 overclock using the catalyst control centre and is this alright? Will it change voltages automatically as it does not have voltage control tab?

I assume this is all ATI will safely let me do, possibly on stock voltages and the afterburner allows more volts to go beyond these limits?
Click to expand...

How did you do that? Mine only allows 850/1250 overclock in Catalyst overdrive tab? I had to use Sapphire's Trixx or Afterburner to go higher.

And no, Catalyst overdrive won't touch the voltage setting (but you probably know this by now!) :D
 
I just installed Afterburner for my HIS 6870, How do i change the voltage? I have it turned on in the options.

Wrong thread but anyone know? using 2.0 afterburner
 
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spirits247 said:
That's well low - anything below 85C is fine.



How did you do that? Mine only allows 850/1250 overclock in Catalyst overdrive tab? I had to use Sapphire's Trixx or Afterburner to go higher.

And no, Catalyst overdrive won't touch the voltage setting (but you probably know this by now!) :D
Click to expand...

Well I am not actually sure. I had afterburner open and overclocked it with the voltage bump and all was fine. Opened ccc whilst afterburner was also open and noticed the max limits had increased. But as I found out you need the voltage increase to keep it stable which the ccc doesn't have the option to increase.

Here's a screen shot, all running at stock at the moment but you can see I can move the sldiers to 1000/1250:



I have had it to 1000/1250 but it needed a slightly higher bump in voltage. Temps did not increase much either (can't remember figures) but the highest I've seen on the card is 67c after several hours gaming.
 
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