Cannot adjust R5870 Lightning fan speed

Hi @all!
I have a big problem:
The catalyst-center and the afterburner show me options to slow down or speed up the vga-fan - but both do not work.
It seems again as made for the reference design with one fan.
How do I control the fan speed of my brand new R5870 Lightning 2-fan card?
Any ideas?
THX!
EH

Okay. THX so far... :-(
I want to get that damn thing silent!
What about watercooling this card?
As far as I know, I need the plate (80,-) a water pump (40,-) a radiator (30,-) aquabox (40,-) and so on and so on... right?
So should I take the pc and walk to the next pc-shop to get the right parts?
Any better ideas? I still have the possibility to return the card to get a more quiet one - but that's a bad feeling... :-)

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