So started playing with overclocking my 770GTX yesterday, I would run Kombustor for 10-20 mins (no artifacts etc), 3 runs of 3D Mark Fire Strike but then the graphics driver would crash on Unigine Heaven 4 
Other times I could run everything and then randomly Unigine Heaven 4 or 3D Mark would crash.
Would you call running a full benchmark on Unigine Heaven 4 a couple of times "stable"?

Other times I could run everything and then randomly Unigine Heaven 4 or 3D Mark would crash.
Would you call running a full benchmark on Unigine Heaven 4 a couple of times "stable"?