Originally Posted by
BulletSponge
First, it is generally frowned upon bumping ones own thread so quickly. Please wait 24 hours before doing so. Now that that is out of the way, to the best of my knowledge HBAO is considered the best form of AO but will have the highest affect on framerates. SSAO is less demanding but does not give quite the same level of "detail". HDAO is for AMD cards so will not be applicable in your case. I have used both HBAO and SSAO in my games and to be honest I cannot really tell much difference other than framerates.
If any of this info is incorrect I hope some of my fellow OCN members will correct me on this, Cheers!