As per title this happens when i raise the power target past 100% in evga precision otherwise at full stock everything I looped heaven 3.0 on max for 8 hours and woke up to it still going instead of a red screen. Now the red screen would happen in Unigine only 3d mark11 it wouldnt happen in, as well as part of my successful attempt with power target at 100% i also left fan on auto so it would go past 70 degrees celcius to see if its crashing when it hit 70 and it hit 86 and never crashed. I tried reseating my sli bridge and all other steps except testing each card 1 by 1 buuuuuut if it is a power problem I suppose 1 card is going to be fine since 3 cards = more power. So what does this seem like a bum card, bum power supply? i dont have any other 1200 watt power supplies just hanging around to test.
 
My specs are
 
i7 3770k 3.5 ghz
noctua d 14 cooler
16 gig gskill 2400 mhz ram trident x memtest for 2 days straight no errors
3 way gtx 670 super clocked 4 gig cards
antec 1200 hcp power supply
2x 512 gb crucial m4 ssd in raid 0
 
so the pc is no slouch at all just trying to figure out whats going on. I do not mind having everything at stock I just wanna make sure this isnt something being bad causing the issue like my psu or maybe a bad card or 2

weird thing to is during that successful run of 8 hours with the power target at 100% btw the cards have sync checked if that makes a diff the power target on all 3 still went to about 109% or so

to add also does this with 304.79 driver 301.42 and 304.48 as well so ti doesnt seem driver releated

anyone know what could possibly be up ro what steps i shoudl take to get to the bottom of this besides what i have tried?

When you raise power target your cards may boost higher, so it is possible that one card was pushed too far.
 
I would suggest to try each one individually to see which one.

thanks for the reply man will do is it normal that the cards to do this since they are rated for stock clockign and i guess power target increase is basically overclocking? i notice to jacob that the boosts on the 2 cards is 1175+ with the power target increase but the one card is only 1100 which is a lot for cards that i think are supposed to boost to 1046 i think normally