LOL fail gl with your OC. You should be able to get to 1000 core clock easy with a little tweak to the voltage. that'll make a huge performance boost.
I know this sounds dumb, but i tried overclocking before. 5mhz more, testing repeat and repeat untill limit, then i tried to add some core voltage, and do the same again.
But everytime i wasn't able to get a stable clock.
So how would you advise me to do it? because i have a card to overclock, but i can't
whats the best tool, etc....