I have decided to maybe buy a geforce 4 TI 4800 but the only thing that is really holding me back is that my cousin put one in his computer and his computer wouldn't start up. He put his old video card back in and it worked just fine. Then he put the ti 4800 back in and his computer wouldn't boot up. He tried this with several different ti 4800s and all did the same thing. He finally came to the conclusion that it wasn't getting enough power so he put a 650 watt power supply in his computer and it worked just fine. Are all ti 4800s like this or would a 400 watt psu power it just fine. I really don't want to get a new psu so if that is the case then i can count that option out.