The board supplies 2.3v for DDR2 but some may like more than that.
You can measure the VDDR2 voltage at the mosfet leg marked above with a multimeter.
Solder a 10K ohms VR to the side of the SMD resistor shown above and ground
the other end of teh VR. Set it at a maximum of 10K ohms and tune down to increase
the memory voltage.
Thats all the mods you will need to do some extreme overclocking on this board.