Overclockers Club published a review on the PowerColor Devil R9 270X
A quote from the article:
Knowing what PowerColor brings to the table with the Devil series cards, it's easy to see it put forth the effort to make sure the design just works. First and foremost it is built to give the enthusiast a long life, all the while delivering great performance for the $239 price point. PowerColor does this by leveraging a custom PCB equipped with its "Platinum Power Kit" 7+1+1 phase digital power delivery solution to make sure the power plane is stable and efficient over the long term. Next, PowerColor adds in a custom three fan, quad heat pipe, dual fin array equipped cooling solution to keep this factory overclocked card from making a trip to the nether world early in its lifespan.PowerColor Devil R9 270X Review @ OCC