I dont much beleive PRIME from two experience.
1) with i7-2600K, PRIME 1h stable without error. But after I was in idle and got sometimes BSOD
2) FX-8150 time, I tried PRIME and got error after few seconds, wtf? Good board (C5F), good cooling (allinone liquid), awesome PSU (gold 1200W AX1200 Corsair) for it.