Well after using afterburner to chk ASIC quality,90.6 and 86.0 same as yesterday.Tried many different voltages and clockspeeds and asic stayed the same.I did not do any reboots.But i did upgrade to the latest beta driver this week.
I really dunno why myASIC qual changed but not worried about it,they still work great,but yes the higher rated card averages 2-3c cooler then the lower rated card.
Perhaps i will pull the cards when dusting off time comes and install them one at a time and see the overclocking limits of each card by themselves.
2600k@4660mhz CM Nepton40XL 16gb Ram 2x EVGA GTX770 4gb Classified cards in SLI@1280mhz Stock boost on a GAP67-UD4-B3, SBlaster Z powered by TX-850 PSU pushing a 34" LGUM95 21/9 3440-1440 IPS panel. Pieced together 2.1 sound system