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I have 3 GTX 680's each currently running at stock voltages.
If i attempt to bump the voltage up to 1.2v I receive unstable cards on all three cards.

Each card crashes in Unigine Valley at 1.2v at any clock speeds, even stock clocks.

Ideally i want to run these cards at 1.2v to get the most out of them.
Had a quick look at my ASIC's scores (70, 72 & 80) suggest they perform better at lower voltages, correct?