No luck with my 580 and the latest version, its basically cooking itself with no performance increase.
gtx660 got a nice performance bump

Yeah, just use the 12-10 version until/if he can fix the increased temps w/o performance increase on older cards, or at least on the 580 since my result with the new version is the same ^^ I mean, if there was an equal performance increase for the heat I'd be fine with it, but absolute waste when it performs the same/slightly less with all that extra heat.