The main problem I see with most 780's is a weak-ass mem controller. Also, the chips can be real volt-pigs. Tbh I liked mine, and have had issues, but nothing major during its punishment. I was one of the lucky ones though.
The nb on mine has a bad heat issue now and gets unstable above stock... Hopefully going extreme on it will give me one last run before she dies completely and is off to rma land.
The 680's have stronger mem controllers. The 780's have tri-sli support. Other than that the boards are basically the same.
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