- Aug 2, 2009
- 4,015 (1.16/day)
Well the pictures don't work for me now, but I'd guess it's just a vortex. Seriously. There is a fan mounted right behind the CPU fan in the normal orientation. Compare the two when they aren't running. It's absolutely ludicrous to think that one would behave differently than the other unless the fins are backwards, or some how your polarities are reversed and it's spinning backwards.