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There are two fan connectors on Asus P4P800 , one is named Chassis fan , other is Power fan. I connected one of the AopenH600B's fan to chassis fan connection. But can i connect the second case fan to "Power fan"? They look similar , but i am not sure.
Sure you can. What they meant by "power fan" header was they expected you to connect a fan speed connector from your PSU to it if it has one. But using it for another case fan is OK and won't hurt anything. However, if you're a OverClocker (OCer), its better NOT to hook case fans, etc. to the mobo headers (fan speed connectors are OK to hook up) -- the less the mobo has to do the better. Instead hook them up directly to the PSU connectors.
Thanks for the answer . So that header is for a PSU fan, but i can connect a case fan too. I checked the user guide , there is no difference between that two headers.
I am not a overclocker , but i want to use the Q-fan feature.