Oh that's one of those Cougar fans, I just bought 2 of them for my case since the stock ones died after 4 years of continuous use. They're really nice and quiet with the rubber mounts.
they really are. I am strongly considering replacing the other stock PWM fan with one. They look AWESOME and are very quiet, but unfortunately have lower airflow. (box says around 75CFM, while the stock fans must push over 100CFM).
BTW: anyone have good liquid cooling ideas or methods? It would be pretty sweet if the antminer boards could be placed into immersion cooling, but i know that they would require a radiator capable of >400W for each antminer which i imagine is costly and semi-complex to install
AFAIK liquid cooling (waterblocks) are not really ideal for ~200W (per blade) spread over a large area. The blocks would tend to be expensive. They are usually made for higher densities. For an ant you would likely need to get slabs custom built... then mount the blades onto it. I did see some early avalon threads where someone got custom waterblocks made... and used a chiller to cool the water.
Immersion cooling could work, just need to figure out how to keep the solution cool...
I think liquid cooling is waste of money... unless you can overclock it to the point of justifying your investment.
edit: found the thread
https://bitcointalk.org/index.php?topic=211825.0