The Quadro 2000D is a workstation card from the previous generation, not in the same league as the GTX 780.
The Quadro K2000D is maybe stronger than the GTX 780 on double precision floating point processing, but I'm really not sure.
The GTX 780 is very powerful but the double precision floating point processing is deliberately crippled.
The workstation cards tend to have better performance in this area.
The K2000D is a much weaker GPU however.
Cards with the same GPU as the GTX 780 and higher performing double precision floating point processing are the GTX Titan and Quadro K6000.