Walan eh..... use the desktop PC halfway crashed and it's an unrecoverable crash! Godamit, think the bios in the motherboard is screwed and now there's no way for me to figure out the way to restore the main bios using the backup bios chip.
 
No choice, in the end I had to email to Gigabyte to seek their advise, and if wat I get is bad news from them, that means my pocket is gonna burn a hole again T_T