Tripple Buffering should actually help. Try changing that one and leave the rest as is and see how that go's. If it cause's any issues then just switch it back. This will also help determine or prove my point with your HD8670 being the weak link in the system. Also lowering the Visual FX setting should help.
Roger. Will do good buddy.
Yes I support This
"Rise like Lions after slumber, In unvanquishable number, Shake your chains to earth like dew, Which in sleep had fallen on you-Ye are many — they are few"