I have just assembled a PC - mobo is gigabyte 8SQ800- CPU P4 2.4ghz, The vid card is 128mb 8X. The PC works fine, but then, after ten minutes or so, the power supply just stops! I have noticed it tends to to this when I try hard core graphics. I have a 400W Q-Tec low noise temp-controlled PSU. What would you guys do in this situation? Dave S London, UK.