Here's 8xAA extreme tessellation 1920x
Cards were 733/3530(1765)
Tried this at a lower OC. With my CPU only @ 145x21 loaded and the cards @ a flat 700/3400. Default 1920x fell to 82.6/34.4. 1920x 8xAA extreme tessellation fell to 44.6/18.8. So I lost about 4FPS on test one and 2 on test two averages.