90cfom and 19db... that rating is almost as bad as SilenX. NO WAY u get only 19db from a 2000rpm fan. it will be in the 30 something range. And u wont get 90cfm either. They look ok for a led fan tho. if u want a pwerful fan the ultra kazes are a very good choise. they undervolt ok. But u wont need that much anyways. Yate loon d12sl-12 is all u need. (1350rpm) but if u think u need abit more u can go with d12sm-12(1600rpm) instead. They undervolt almost as good as the sl ones. And i bet u cant measure the difference between the sm and ultra kaze fans on the pa rads.