Asus EAH4870 512MB D5 fan control issues

hi, i cannot seem to control the fan via ccc/att/rivatuner/smartdoctor. the fan duty cycle will change but no noise difference and the rpm will stay at the same fluctuating levels.
the only time the fan rpm changes is when the gpu is under load. but even then, the fan rpm "decreases" :(

i have included the screenshot of att during furmark here
and the card is this one

do i need to flash the cards bios to get fan control?
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  1. Yeah i have the same card and the same problem its a bitch did you find any solution ??????
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