Sorry for the late reply. 1. Done It 2. It does not require addtional power source 3. My friend is using on board gfx. The problem is it does not detect my friend's gfx so when i disable on board gfx, my friend's monitor appear nth and i have trouble resetting the bios to the the setting back to on board gfx 4. Tried UNI blue software to scan the whole system. It seems like there's this file from windows cannot b updated. I will try going my friend's house to check the error and post it back on the forum. Sorry for my poor english and thanks for the advice.