thank for great information.
I have tried to set that I will perform high performance Nvidia on FF14 now ( the Nvidia has the setting which program to use which), and the problem still happen time to time. (i think it happen as soon as priority go to something else, this apply to those pop up from MSN, browser shift or window update too. I m not sure if there is a way for me to temporary switch this system off completely while I m playing game or not)

I m not sure about how to configure it on the Bios as you said tho? Can you guide me around?