its not that easy. i think i have to play with TDP. i feel like the less the TDP is, the more i can bench or game before i get black screen and get a reset. i dont know why.
what does this symptom sounds like?
I think if anyone of you could remotely connect to my computer over the internet and check things for yourself, it would be great. and yes i would pay.
If you black screen at all.. Doesn't matter how long it takes you to black screen, the system is not stable. Using how long it takes you to black screen, is not a good way to measure stability at all. It just means the bug got you at a different time.. I'm agreeing at this point your gpu is likely just not a good overclocker..
Differences between a 670 and a 680 matter, IF you have a system and set up that would be better suited for the 680. Higher res runs better on the 680.. A 690 though would be total overkill, for someone considering to get a 670 if the price was an issue.
It'd be like me sayign "hey I want to build a single gpu system" then someone telling me I need to go sli.. My 680 does fine all by it's self..
About a 690 vs a 680 though.. Again a pointless argument in any sense of the word.. That's like comparing 2 680's vs 1 680.. Price and performance wise.. Makes no sense what so ever.