If any of you have been experiencing a problem with these new sgminers running under 14.6beta let me give you an example of what happened to me:  I have 4 rigs of 7970s and 280xs.  3 rigs were fine running x11-x15 under the new AMD beta drivers.  The other one would run for anywhere from 20 minutes to 2 hours and die with a BSOD no matter what engine speed, voltage, or memory speed I used.  After days of troubleshooting it finally came down to doing a complete uninstall of all AMD software, reinstall 14.6 and remove GPU devices and drivers and reinstalling the device drivers for the GPUs.  That finally fixed it.  Even though I treated all 4 rigs the same, sometimes something glitches out.  I hope this saves someone somewhere some time.