How do I run a stability test?

GraySkies

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Dec 30, 2011
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I strongly suspect my NVIDIA GeForce GTX 560 Ti is dying on me. To that end, I grabbed Furmark with the intention of running a stability test...but there doesn't seem to be an option to do that in the user interface. I see benchmarks but no stability test. How do I set up a stability test, and what should I be aiming for as far as length of time, settings and so on?