...Have been lucky enough to score the use of an EVGA 780 Ti SC with ACX coola - price aside, these cards really put in when it comes to boost clocks, this particular one, (ASIC quality 75.5%), boosts to 1150 consistently, stock volts of 1.187. I have seen this exact boost clock reported on...
Have found a nice 'consistency' in MS over the years with activation of upgrade licenses without a core OS - install the new OS, then upgrade from within. Seems Win 8 continues this tradition. Can attest to it.