I almost give up on this new rig. Already change HDD, RAM and now just bought a new Mobo for testing. Still bsod even after reinstalling win7 several times. Thing is, this happens very randomly. Sometimes it happens as soon as I enter windows, and frequent. But after few restarts it could go on doing everything without any error. For few days it could run flawlessly. Tried few torture program out there none could reproduce the bsod. I attached 3 of my latest bsod dmp file, hope you guys can help. thanks.