RAS if not very high efficiency; for the price of a big game you have the perfect cooler for even the large processor is capable of cooling without problems. Noctua The model above is for servers in my opinion. Buy your eyes closed compatible AMD and Intel. Beware though, the cooler is rather large, but as noctua is a good brand there is a compatibility list on their website (very well the way.) In the end he returned really well in my Be Quiet Silent Base 800 it well my intel 4690K cool, no problem.