Approximately how fast should a system rear chasis fan spin?

[stonecold3169]

Hi, I've got somewhat of a problem here. The problem I've got is I have a generic bearing fan in the rear of my case, and I think it's spinning much, much too fast for it's own good. My monitors tell me it's spinning at between 6,000-6,500rpm. Isn't that incredibly fast?

Now, granted, I'm not worried about the actual cooling inside, as everything seems normal, and maybe even a little low. What I'm concerned about is that it is now deafeningly loud as well. I don't recall this being nearly as bad until I switched to my Abit KT7A RAID board. Seeing as how there are multiple fan headers on the board, do some operate at faster speeds then others? I'm just really confused about this.

One last thing. When I swapped mobos, I had to pull the fan out to mount the board. Does it make more sense to have the fan pulling air into the case so that the powersupply fan can pull it through and circulate it, or should it be pulling air out of the case?

Thanks in advance, sorry for all the questions!

 

[lorlabnew]

Regarding your 1st question; I had the same problem as you (2 powerfull fans in the back of Antec case).

I ordered new both thermal-controlled and adjustable-speed fans from inflowdirect.com . I love these fans, spinning well under 2000rpm in my room temperature. I ordered Enermax brand, but they have more choices, just look for dB, revolutions and other specs..... prices are very nice compared to retail. Have quiet PC now, and still cooled very good.