Clock range on ATI Overdrive on 4850 seems low

vj8usa

Senior member
Dec 19, 2005
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I'm thinking about OCing my 4850 since it runs cool and I can't lower its fan speed. However, the GPU Clock slider in Overdrive goes from 500 to 675. Is this normal? The card came at the stock GPU clock of 625MHz, so I can't see why the slider goes down to 500 (it normally goes down to 500 when throttling to save power, but I figured Overdrive would take this into account). Is there any way to fix the range of the slider so that it starts at 625 and goes past 675 at the high end, or is it like this for everyone that has a 4850?

On the other hand, my VRAM clock slider seems fine - it starts at the stock 993 and goes up to 1050.
 

YBS1

Golden Member
May 14, 2000
1,939
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Try reinstalling your driver. Something is wrong there, mine goes up to 700/1200.
 

vj8usa

Senior member
Dec 19, 2005
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This is with 8.10. Before this, I was using 8.9, then 8.10 RC2, and at some point in between I was using the original hotfix driver that came out when the 48xxs were first released. I used driversweeper when changing driver versions, and my slider's been like this with every driver I tried.

http://vj8usa.googlepages.com/overdrive.png
 

error8

Diamond Member
Nov 28, 2007
3,204
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Just use Riva Tuner 2.11 and forget about the stupid ATI overdrive.
 

GaiaHunter

Diamond Member
Jul 13, 2008
3,606
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Originally posted by: error8
Just use Riva Tuner 2.11 and forget about the stupid ATI overdrive.
:thumbsup:

Mine goes up to 750. It seems it is different from card to card.
 

VirtualLarry

No Lifer
Aug 25, 2001
54,526
8,656
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Originally posted by: GaiaHunter
Originally posted by: error8
Just use Riva Tuner 2.11 and forget about the stupid ATI overdrive.
:thumbsup:

Mine goes up to 750. It seems it is different from card to card.
I think it has to do with the card's BIOS. The OEM can lock the range of clocks that ATI Overdrive allows the user to select.
 

TBSN

Senior member
Nov 12, 2006
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I just got Riva Tuner for my NVidia card and it is really great. I'm still figuring it out, but I would definitely recommend it. I've never had much luck with the drivers' built-in OC'ing features.
 

vj8usa

Senior member
Dec 19, 2005
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Cool, thanks. I gave Riva Tuner a try, and it seems to work pretty well. I guess my card isn't as overclockable as I'd hoped - 700/1100 made me crash after a few minutes of Crysis. I'll mess around with the clocks a bit more when I have more time.

By the way, is there some way to let the card throttle down when overclocked but idle (like with PowerPlay)?
 

error8

Diamond Member
Nov 28, 2007
3,204
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Originally posted by: vj8usa
Cool, thanks. I gave Riva Tuner a try, and it seems to work pretty well. I guess my card isn't as overclockable as I'd hoped - 700/1100 made me crash after a few minutes of Crysis. I'll mess around with the clocks a bit more when I have more time.

By the way, is there some way to let the card throttle down when overclocked but idle (like with PowerPlay)?
Ok, use this guide here for lower power consumption through Riva Tuner, in idle mode:

http://www.hardforum.com/showp...033034793&postcount=21

And this one to increase your fan speed, to make room for a higher overclock:

http://www.hardforum.com/showp...033029086&postcount=10
 

GaiaHunter

Diamond Member
Jul 13, 2008
3,606
134
106
Originally posted by: VirtualLarry
Originally posted by: GaiaHunter
Originally posted by: error8
Just use Riva Tuner 2.11 and forget about the stupid ATI overdrive.
:thumbsup:

Mine goes up to 750. It seems it is different from card to card.
I think it has to do with the card's BIOS. The OEM can lock the range of clocks that ATI Overdrive allows the user to select.
I think that too. Just don't know if they have a good idea about the chip oc potential or not. Overdrive detects my card at 740 core for example.
 

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