i was searching the net for 50 mm fans to be fit on the top of my Mini-Tower gaming case for heat exhaust. after going through some fans. i thought the average CFM for a 50MM was 10. but was i wrong!!. Cuz i found this Delta AFB0512HHB 50x15mm Fan!! it spins at 6400rpm and drives at 16.24CFM! link so should i go for it or consider other slower ones?? note that i will be having these installed side by side in a pair/triplet.