ipkha
bcavnaugh
yodap
980ti also does 2 wu faster than 1 by an average of a couple minutes. I was concerned about more heat but it wasn't the case.

I won't have time to test my other cards before the contest. Less than six hours now. I may miss the start.
For Heat and a Solid 100% GPU and 100-106% Power I will stick with 1 Task Per GPU.
I think that 2 or 3 minutes are not going to make that big of a difference in the end.
Remember Team Do Not Download Any Tasks Before the Start Time.
I had to start way early as I am working till 4pm today. How does the 2 tasks per gpu work? Does it just shave a few minutes in total off the 2 units combined? I would personally think the overhead of running 2 units at once would decrease the throughput. I could try setting that up this evening if it really helps. Be interesting to see if Pascals better preemption makes a significant difference.
By using the app_config file it makes the GPU run two at the same time.
If it does two WUs in less time than it takes to do two WUS one at one time, it is worth doing it that way.
Not sure why, but most of the time it is better to do two at a time.