"A further check, is to analyse what is written on the label of the supply. Unless your 500W is one of those lousy Powmax from 5 years ago (really weak 12V output), chances are the current rating on the label is high enough for the hardware you have identified so far." Read above from another post. I do have a weak 12 V supply. Should I replace power supply with 500 W. (This computer is over 3years old).