Would it not be better to sacrifice some image quality you would hardly notice to get the FPS to over 60fps?
Maybe I am showing my age, but when playing Quake 3, yes I am that old but a higher FPS always gave a more pleasurable and enjoyable gaming experience than say playing at 20-30fps with maximum eye candy.
I used to find some detail settings had little effect on image quality but a drastic improvement on FPS and whilst running around killing everything you did not miss the extra image quality but really enjoyed the improved fluidity of 60fps over 30fps or say 120fps over 60fps.
Gaming at 30fps just feels to me well slow, even if it is smooth it is just not the same as having 60fps plus or 120fps plus.
The only technology I have experienced that makes 30fps seem more like say 60fps when it really is not is say G-Sync.