The responses from this thread indicates that the earlier batches (pre-1010) are the ones that make this noise. Whether later batches (post-1010) make the noise, is still uncertain.
So it would not surprise me that both your motherboards, the 1002 and 1009, make the noise.
Maybe you can try to RMA it, and specify that you would like a newer batch UD3R that won't make the noise.