I have a hyper media case for my media center pc, but the powersuply thats included doesn't seem powerfull enough to run the equipment in it. so i figure i either need to rebuild it with lower power components which isn't really an option. or find a powersuply which will fit in the case or even an external one. the current one is only 200w, i figure i need at least 400w. does anyone make an external powersupply?