i would use a fan. a heat sink is nice, but that is typically handled by the frame of the PSU (power supply unit); i.e. the rectifier is connected to the chassis. before you put the PSU in the enclosure take some temperature readings with the unit running under normal load. then put it in the enclosure and repeat the process. the differnce in temperature will allow you to compute the amount of heat the PSU is making, as well as the air flow needed to remove the excess heat. one note, if the temp gets mush above 120deg F (48.9 deg C), shut the PSU down to prevent damage to the circuit card and components. hope this helps... |