GTX580: 1.025VID: 950/1900/2300: stock cooler: guaranteed?!?

[Demo]

Try gaming or Vantage. I wouldn't recommend fixed image tests (Furmark, OC Scanner, ATI Tool) to test for instabilities.

Any specific test to loop under Vantage?

I wouldn't recommend Furmark (and similar) application at all, especially with OCP turned off. You could burn your VRM.

How can I check if my OCP is turned on or ff?

I've found an extended Heaven Extreme Tes run (like 30min or so ) with max AA along with Vantage (max res, settings, aa, resolution pending monitor ) with feature tests 3x loop and 3DM11 on demo + test usually shows instability. There are never any guarantees with this stuff but in my own experiance if a voltage / clock is unable complete all these tests, instability is likely. From there I simple do the things I normally do ( games, decoding / encoding etc. ) and if all is well you have your answer

On a side note I've found Just Cause 2 to be quite effective at stressing hardware and ironing out instablility. Sadly There appears to be some inherent driver instablilty and it has ocassionaly crapped itself on me on more than 1 machine ( another with a 470 ) even at stock.

Noted, Max Tes + AA under Heaven
Vantage Feature tests looped at max settings and 3DM11 demo

I want to perform some of these benchmark tests or synthetics before I go with my real world gaming test for stability.

EDIT:

BTW, how can the vantage feature tests be good since the down time inbetween tests is quite long.. its not really a single flow of different tests ?
Which game test on 3DM11 is very sensitive to overclocking, something that we can loop several times or so..

EDI2:

Initial testing for 1.000v I got 2 stable loops on 3DM11 Demo with performance preset, all sliders to max out side from MSAA which i left at 2x and running at 1680x1050.