•A higher GPU clockspeed of 1000MHz, up from the 7970′s 925MHz.
•A higher memory clockspeed of 1500MHz, up from the 7970′s 1375MHz.
•And PowerTune’s new “Boost” feature, which allows the graphics to dynamically overclock itself up to 1050MHz if the GPU has thermal headroom.
heres the link for the file http://icrontic.com/article/radeon-7970-ghz-announcement
i don't think i'm going to try it until i get some results from different card manufacturers and see what people are saying about it.