joeeoh
El_beastador
It is constant as the fan speeds up from zero. It becomes intermittent/rhythmic at a stable speed. I'm not making this up, I've got my face right in front of my card as it beeps at me.
This is also how I am experiencing it. I wish I could link video but my account is restricted.
As I posted above in a edit. As all three fans are identical as far as I know, the fact that everyone is reporting the same fan POSITION as being the problem would seem to rule out the FAN being the issue and it being either interference or issues with the PWM controller.