I was able to transform a cheap mobo with 3+1 phase (ASUS M5A78L-M LX V2) in a powerfull overclock mobo, just using very cheap and small heatsinks ( i already had) and two tubes of artic alumina thermal adhesive, sorry for my english, i am from Colombia.
THIS IS THE MOBO WITHOUT VRM HEATSINKS:
HERE ATTACHING THE HEATSINKS TO THE CHOKES, DRIVERS AND MOSFETS WITH ARTIC ALUMINA THERMAL ADHESIVE, THIS PRODUCT IS AWESOME:
IN THE RED CIRCLES YOU CAN SEE THE GLUE (ARTIC ALUMINA:
HERE, HOW MOBO WAS BEFORE:
AND HERE, HOW LOOKS AFTER:
SOME BLACK SPRAY PAINT:
FINAL WORK WITH NEW NORTHBRIDGE AND SOUTHBRIDGE HEATSINKS, WITHOUT INTERFERING ANY PCIE EXPRESS PORT: