I repeat the process several times but the outcome still same. Suspecting that my RAM is the culprit, I opened the case and find my RAM had it connector fried. Firstly the fried connecter become black (burned), then after few scratch and patch, loose a few layers of PCB, to no avail.
Quite a frustrating shot though....
So I decided to run my PC using half the amount of RAM as usual, you know......with Vista... and Aero thingy, my PC become sluggish. But to my surprise, it still run games flawless albeit a bit slow on loading.
Time to do some RAM shopping again I guess.