How important is MOSFET cooling while overclocking?

[digitalx0]

I currently have a DFI LanParty LT P35 and have two thermalright chipset coolers (HR-05/SLI IFX and HR-05 IFX) and was wondering how important cooling for mosfets are. Could I safely overclock my cpu and board and not really worry about the mosfets?

 

[soulesschild]

Just throw a fan over them.

 

[digitalx0]

Just throw a fan over them.

http://www.newegg.com/Product/ShowImage.aspx?CurImage=13-136-039-04.jpg&Image=13-136-039-04.jpg%2c

Is that heatsink too small to effectively cool it passively?

 

[dnottis]

very important with a quad. My P5K-E gets hot with my Q6600 overclocked. Not so much when I had the E8500 @ 4.5Ghz though.

I picked up the Enzotech mosfet block for mine - http://jab-tech.com/ENZOTECH-MST-81-Mosfet-Heatsink-pr-4183.html