Is there much of a difference in the Points Per Day potential of current generation cards from AMD or Nvidia? Is double precision arithmetic important at all (would a Titan earn more PPD than a 780 Ti)? Has Nvidia or AMD traditionally been better for folding, or have they leapfrogged one another every so often? What is the speculation regarding the next generation cards from both camps, if any?
Would any of you cringe at the thought of folding with a reference R9 290 twenty four hours a day?
I'm tentatively planning on upgrading from my 660 Ti in the first or second quarter of next year, and I'd like to make F@H PPD one of the main factors to consider.