I did not want to hijack the thread on Nvidia cards. Doug Eadline as usual makes a very relevant point: "BTW, I find it interesting one of the most popular codes run on Nvidia GPUs is Amber (MD). It has been optimized to use SP when it can and many Amber users turn off ECC because it slows down the GPU which translates to runs really well on Nvidia video cards."
I would like to start off a discussion on choosing the appropriate precision for calculations. I believe that there is a generally agreed limit for an exascale machine of 30MW of power consumption (I could be wrong). So people are looking at the energy consumption per computational operation. I believe computational scientists will have to start paying a lot more attention to the choice of data types, rather than declaring double precision. Just my two pennies worth.
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