I'm using a Seasonic S12 430 watt PSU. My guess is if it's not the card, it is my PSU, but the only power supply recommendations I've seen for this card just say >400 watts. My other components are not power hungry - x2 3800+, Foxconn Geforce 6150 micro-atx mobo, 2x512 OCZ ram, and two HDD's...