The Xigmatek HDT-S1283 utilizes a 120mm rifle bearing fan that is
rated at 1000 - 2200 RPM and produces 72.1 - 99.6 CFM's (depending on RPM).
The fan has a moderate noise level of 28 - 32 dBA, which should be fairly
quite in a closed case.
FULL STORY @ MODDERS (http://www.modders-inc.com/reviews-story--164.html)