So, should you buy this card to play Crysis 3? Here are the compiled Crysis 3 benches from almost every major reviewer, in order of popularity:
Single GTX 780:
http://www.anandtech.com/show/6973/nvidia-geforce-gtx-780-review/16
http://www.guru3d.com/articles_pages/geforce_gtx_780_review,23.html
http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_780/13.html
http://www.hardwarecanucks.com/forum/hardware-canucks-reviews/61310-nvidia-geforce-gtx-780-review-7.html
http://www.tomshardware.com/reviews/geforce-gtx-780-performance-review,3516-9.html
http://www.hardocp.com/article/2013/05/23/nvidia_geforce_gtx_780_video_card_review/5#.UZ7ytLX-GaU
http://techreport.com/review/24832/nvidia-geforce-gtx-780-graphics-card-reviewed/3
http://hexus.net/tech/reviews/graphics/55445-nvidia-geforce-gtx-780/?page=7
http://www.vortez.net/articles_pages/nvidia_gtx_780_review,15.html
Meanwhile the SLI scaling with 2 x GTX780's turned out to be nothing short of spectacular...GTX 780 SLI:
http://www.guru3d.com/articles_pages/geforce_gtx_780_sli_review,21.html
http://www.techpowerup.com/reviews/NVIDIA/GeForce_GTX_780_SLI/10.html
http://hexus.net/tech/reviews/graphics/55577-kfa2-geforce-gtx-780-sli/?page=6
http://www.tomshardware.com/reviews/geforce-gtx-780-performance-review,3516-17.html
Enjoy!