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5870 over volting and o/c results

Soldato
Joined
18 May 2003
Posts
4,884
Interested to see what people are doing with their 5870's, especially if changing the voltage.

For those wondering, here is where asus get their 38% increase claim for their custom volt cards, it's the 5850 that can get +38%

On the statements of producer, the voltage on the graphic processor Of radeon HD 5870 can be raised from 1.15 v to 1.35 v which will allow to increase the clock frequencies from default 850 MHz for the core and 4800 MHZ QDR for memory to 1035 MHz and 5200 MHz QDR respectively. This allows to raise the result in the known synthetic test 3DMark vantage, using extreme profile by 14%, from 8087 to 9252 points. Low-end video card , Radeon HD 5850, allows raising the core voltage from 1.088 v to 1.4 v, which allow to increase the core and memory clock frequencies from 725 MHz and 4000 MHz QDR to 1050 MHz and 5200 MHz QDR, respectively. The growth rates compose +45% for the core and +8% for the memory. In the same 3DMark vantage this allows to increase the score by 38% from 6501 to 8987.

from : http://xtreview.com/addcomment-id-10090-view-Radeon-HD-5870-voltage-and-overclock.html
 
Soldato
Joined
18 Aug 2005
Posts
13,160
Location
Shropshire
Wow those 5850s seem a cracking card for the money, once volted its hitting near on 5870 points in the benchys.

Does game performance show the same results though?
 
Soldato
OP
Joined
18 May 2003
Posts
4,884
870 ? whats the sotck 850 ?

memory sounds a lovely clock though :)

Sorry meant 890, yes 850 stock. The CCC only lets you go up to 900 though.

I benched with vantage but it crashed so the above isnt stable, funnily enough it ran through through both game tests flawlessy then crashed on the first cpu test. A bit weird that as I would have though the graphics card was no longer being stressed at that point. Maybe power as I'm still running off my very old enermax 500W, got a 1KW waiting in the wings when I can be bothered to switch.

Good news though as I think the above means a little bit of volt increase and it will be stable at those clocks.
 
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