q8vens


thanks, so my settings should be:
the stock core clock 772 MHz
memory clock 4008 MHz
shader clock 1544 MHz 
voltage 1.00

I have one more question, will lowering the voltage void the warranty??

 
memory clock should be 2004 in Afterburner NOT-->4008 (if you try and set 4008 you will blow up your card)
Whatever memory value is set in Afterburner is DOUBLED, so setting 2004=4008 

 
Lowering the voltage with Afterburner will not effect your EVGA warrenty, but dropping the voltage may/or may not be stable.. if 1.000v does not work, you will need to add some more.
 
Your cards temps are normal for running with the fans forced to 67%... ramping the fans better with a custom profile will drop temps more than ANY voltage changes. 
 

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Since your running SLI, you should "sync" both cards in Afterburner. This way any changes apply to both cards.

 
As for your fan profile, since your cards appear to be getting nice temps...
Try a profile that sets 70-75% fan speed at 70c and see if the noise is OK.
 
Really bro, you bought (2) 580's... they are going to make noise if you want that kind of performance
and 83c at 67% fan speed is nothing to worry about whatsoever, although you could probably get them to run in the mid 60c range if you didnt care about the fan speeds.
Personally, I use headphones and run my fans at 85% for any temps above 65c (see my profile)
(I use the stock BIOS (no fan unlocker as that increases voltage) and my cards are both factory VID at 1.000) 

 
Using the above profile, with fan min set at 50% (see my idle temps below)

 
Using a aggresive profile like mine, keeps the cards max temps very low running stressful benchmarks..

 
*Normal stock voltage from the factory ranges from below 1.000v to 1.088v
Since all cards are set differently at the factory, anything inside that range can be set without worry..
-->the only question is if its stable at a lower voltage.  
   
     
 

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Without lowering the voltage, you do not gain obvious improvement upon temperature. Voltage is the dominant factor in terms of power and temperature.

q8vens


I played a little more and temps are great so far, I just wanna ask two more questions,
(question1) does the voltage/underclock affect the quality or just the performance?? If the answer is no I'm going to set voltage at 1.000v and see what happens..
(question2) what would happen if 1.000v isn't enough??

Volatge effects neither quality or performance... unless the voltage drops to low and the card or driver becomes unstable.
 
Give 1.000v a try, if its not enough... you will know it and no harm will be done