Noctua NF-S12B and NF-S12A:
http://www.noctua.at[...]
http://www.noctua.at[...]
They have started making them in grey:
http://www.noctua.at[...]
Super silent operating mechanism - no cranky / no buzzzz / no high-pitched noise, only you can hear is air-movement ... which you cannot hear @ low rpm speed (400-500rpm).
I use only NF-S12B fans in my PC (got 7 of them), it`s successor is NF-S12A:
a) FLX:
http://www.noctua.at[...]
1200/900/700rpm
b) ULN:
http://www.noctua.at[...]
800/600rpm.
#1
I have bought 3 x Scythe Gentle Typhoon 800rpm - people said they are nice ... what a s**t, it`s high-pitched noise ruines all the silence that comes from low rpm speed (i got fan controller, was running them @ 500rpm, but the high-pitched noise made them unable to use - for me).
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P183 V3 @ 500rpm, P8P67 Deluxe, i7-2600K @ 4.0, NH-D14 @ 500rpm, 840 PRO 256GB, 8GB 1866/CL8, GTX 580 + Alpenföhn Peter @ 500rpm, SF 1000W Platinum