i found out its not the fans
it turns out that the case i put the server in has a unique problem that i have never encountered before. the case is a coolermaster centurion 590. it is the first time i will be throwing away a new piece of hardware, the second i can afford a different case, like the antec 300.
anyway, on the side of thsi case there are 2 places to put fans blowing air (presumably) in. i tries ultra kaze, coolermasters, yate loons and brand x fans. all of them when installed blowing air in set up a vibration that created the buzzing sound. for ome reason i cannot fathom when set up to blow air out there is no noise at all.
this buzzing is also created on the fan place at the back of the case. i installed one blowing air in by mistake and thats what i got. i reversed the fan and no more buzzing.
i have a fan blowinf air out on the top of the case and would jsut reverse this to blow air out at the side but then there would eb the buzzing noise again. all in all due to this and the lack of a reset switch i would definitely recommend to anyone that they not buy this case.
thx
rob123
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