Originally Posted by Revs
I would do some testing while just altering your core clock. I found very little gains over 700mhz. There's no point in needlessly stressing your GPU
Of course there are gains over 700mhz core, its not like the GPU will not benefit from anything faster than 700mhz as that makes no sense.
I get a few more FPS with my core at 760mhz vs 700 and I can tell you my GPU is not stressed at all, card runs very very cool.