You already have "MOSFET cooling".
End the discussion guys it seems every one of you forgot to even consider what is the CPU cooler he is running.
Your downward blowing (i.e. towards motherboard) Rocketfish Universal Cooler provides airflow to the VRMs keeping them cool and stable. No further action is necessary.
Don't be fooled by the others though, it is NOT fine to leave a 125W Phenom II x4 processor without ANYVRM cooling (neither airflow no heat) on 4+1 phase setups because in such a case heat can certainly easily and quickly pile up; as a result of that you may run into some efficiency and operational issues including ability of VRMs to keep up that may trigger protective measures and thus cause you to lose performance or saved data. However, again as in this case there IS MOSFET cooling, no further action is necessary.
Edited by xd_1771 - 2/18/12 at 8:51pm