http://www.dualshockers.com/2014/04/13/watch_dogs-pc-video-recorded-on-rig-with-core-i7-3930k-and-geforce-titan-amd-cards-will-have-hbao/
- A lot of different specs will run the game at high level of detail, but for ultra you’ll need at least an Intel Core i7-4770K with a GeForce 780
- The Nvidia Tech PC video was recorded on a rig with an Intel Core i7-3930K and a GeForce Titan.
- Those that use an AMD video card won’t be able to enjoy Nvidia’s TXAA (Temporal Anti-Aliasing). HBAO+ (Horizon Based Ambient Occlusion), while developed by Nvidia, will still work on AMD cards.
I'm not a PC gamer and I have no idea if this is good news or bad news. Will let PC GAF decide