Are you overclocked? Do you have the latest drivers installed? Does it allow you to de/select algorithms? If it does, some of those newer, more obscure algos aren't as stable as the older ones... like phi and xevan have crashed my rigs in the past using other multi-algo stuff like NemosMiner.
I have the latest drivers installed. I didn't have Afterburner open when I tried Uberminer. I don't even get to the point of selecting an algo...it shuts off seconds after I agree to a benchmark.
And to answer your question above mine, I'm trying to test this on (4) 1070s. As soon as I get it up, you'll have an answer!