Trying to pinpoint on whether it's motherboard or graphics card that's giving me problems. The attached pictures tell most of the story I believe...
Additionally, it happens right after I received a couple of BSOD about memory dump (first experienced when playing Virtua Tennis '09... EA games >.>). I'm using a Geforce 8800 GTS. So far, tested on another monitor and it gives the exact same thing, as in the lines are identical no matter which monitor I'm using, and does not appear randomly. No additional graphics card to test. PC successfully booted up in safe mode but not normal mode. Basic windows repairing doesn't work.
Advise needed urgently. Thanks. Hopefully solution doesn't require me to change the whole motherboard -.-