Where the Tesla shines vs NVidia "consumer" cards is in Double Precision Floating Point operations - this specifically includes the current-generation Titans, not just the GTX 10xx series.
This is exactly true. If you don't need Double Precision operations, there is no point wasting money on this graphic card.
They're intended for usage in specific server cases with a lot of airflow through the case - thus the "no fan" passive cooling setup.
A friend of mine did the error of purchasing Tesla K20 without a built in cooler and without a dedicated server case. It was quickly overheating, even with an external cooler blowing air close to it.
Overall, not a good card for mining.