I used to have an ASUS 1GB 7770 HD and did a fair bit of casual gaming on it. Tomb Raider, Bioshock Infite and Arkham Origins all ran without issue at 1600x900 on medium settings. For me, a solid 40-50 fps was adequate to enjoy a game, your standards may be higher. From my experience I would be surprised if it failed to run watchdogs on minimum settings. However, mine was paired with a sandy bridge i5. Your mileage may vary with a 1st gen i3 and as previus posts have said, it is notoriously intensive on resources.