Have these fans and have another fan from Noctua in my system and am just thrilled. Cooling capacity is right and the fans are really incredibly quiet. I can now hear my hard disk to work. Add to that a spitzenklassiges accessories. More can not offer you. Although I like the design at all (I habs rather in simple black), but I verbaue no fans because of her appearance. I have a middle class gaming PC by 2 years ago (i5 CPU and GTX 660TI Graka) and everything is nice and cold even with load. CPU comes as at 50 ° C and 40 ° C in graphics card. Buy recommendation!