someone playing the PC version is reporting more Nvidia GameWorks issues- PCSS shadows and HBAO+ Ultra, are causing dips in performance upward of a loss of 20 frames per second...
https://www.reddit.com/r/pcgaming/comments/3t81ww/ac_syndicate_pc_port_report/
https://www.reddit.com/r/pcgaming/comments/3t81ww/ac_syndicate_pc_port_report/