I have been thinking power issue from the start.  I have tried a different power supply but not the suggested CX750.  Still the same problem.  Hash up to 2000-3000Mhash then fizzle down to a reboot.  Wash, rinse repeat all day long.  Are there any power troubleshooting guides?  I have tested the voltage at the connector and it reads 12.25V once the PSU is turned on.  I then tested the outer power pins on the blade, still shows 12.25.  I'm stumped here.  Seems like it should be working but I just can't cross the finish line.