Thanks oqhansoloqo I appreciate the effect should be subtle. But I still see no difference. If anything, it looks like its always on regardless of ENB settings. Some examples:- ( edit : I messed up the links, so apologies if anybody clicked them and they made no sense. All fixed now ) Dragonreach AO on : https://chromafunk.com/tmp/ScreenShot47.jpg AO off : https://chromafunk.com/tmp/ScreenShot48.jpg In store AO on : https://chromafunk.com/tmp/ScreenShot49.jpg AO off : https://chromafunk.com/tmp/ScreenShot50.jpg Around town AO on : https://chromafunk.com/tmp/ScreenShot51.jpg AO off : https://chromafunk.com/tmp/ScreenShot52.jpg It looks like AO is on in all the above pics, agreed? And yet, there is no difference visually between on or off. But something is definitely happening, as when I turn it on in the ENB settings, my performance drops by 10%-20%. But no visual change. So, in your opinion and other knowledgeable folks on here, does it look like AO is on in my pics? If so, then anybody have any ideas where its coming from? My AMD driver has no AO option and im running no software that affects these things, eg RadeonPro. If it possible that my AMD drivers are forcing it on? But even then, you would think there would be some visual difference between AMD AO and ENB AO. Any ideas?