Hi there thank you for replying to my problem. i already did enable vsync in catalyst control center. i think that improve a bit. there's still a little of jumping effect on the screen. anyway, i have Realtek HD Audio driver installed which giving me crap sound quality when playing music or videos. i used to have Realtek AC97 driver on my old PC which has decent sound quality.
Do you know how to configure the Realtek HD Audio properly ? i tried tweaking it few hours ago. no luck it's still the same. or should i just uninstall Realtek HD Audio driver and go for AC 97 drivers ?