Voltage baseline for 5870 speeds on the 5970?

[scooterlibby]

The overclock of my 5970 to 900/1200 has not been stable lately at a voltage of 1162 mv. Frankly, I'd be happy with a standard 5870 clocks in each GPU and was wondering if anyone with experience had a suggestion as to what would be a voltage baseline to start from to ease back and simply do 5870 clocks. I do not think stock voltages will do.

 

[tweakboy]

You might need to do voltmod


Also make shure when your OCing your card to take fan up during gameplay, well see what the GPU temp is.

Also how are your cpu temps,,,,, maybe the fan is drun on that thing and cops stop you

 

[ViRGE]

The standard voltage for a 5870 is 1.1625v. It would be easiest to start there and work your way down.

 

[MarcVenice]

The standard voltage for a 5870 is 1.625v. It would be easiest to start there and work your way down.

I suppose you made a typo, but standard voltage for a HD 5870 isn't 1,625. I've seen different voltages (from reviewsample to retailsample) and they ranged somewhere in between 1,15 en 1,18v.

 

[tweakboy]

Other then that your playing with fire. There is no diff without OCed , its all in yalls head...

gg

 

[Jacky60]

My 5970 was good for 900-920 at 1.1625 but recently dropped voltage and it runs stably at 850/1200 on 1.125 or fairly stable at 900/1200 1.149.

Much higher and I now get artifacts so I'd drop right back if I were you (1.125) and work from there.

 

[Jacky60]

What I don't understand is why previous overclock was stable for 5 months then became unstable-new drivers perhaps who knows?

 

[MrK6]

What I don't understand is why previous overclock was stable for 5 months then became unstable-new drivers perhaps who knows?

Are you in the Northern Hemisphere? Summer gives higher ambient temps, and therefore higher loading temps, and your clocks won't be as stable.

 

[ViRGE]

I suppose you made a typo, but standard voltage for a HD 5870 isn't 1,625. I've seen different voltages (from reviewsample to retailsample) and they ranged somewhere in between 1,15 en 1,18v.

Whoops. That's 1.1625. There are too many 1s in voltages nowadays.

 

[scooterlibby]

My 5970 was good for 900-920 at 1.1625 but recently dropped voltage and it runs stably at 850/1200 on 1.125 or fairly stable at 900/1200 1.149.

Much higher and I now get artifacts so I'd drop right back if I were you (1.125) and work from there.

Thanks. That sounds like a good place to start. And thank you Tweakboy for lightening up the thread as always.

 

[VulgarDisplay]

What's the safe limit for overvolting a 5870 chip?