Hi, i have a Medion md8393 desktop PC and need to find out the wattage of the power supply to see if i can upgrade the gfx card without also upgrading the power supply, i've had the machine open and there is nothing on the power supply to say what it puts out, no name or anything, not even a number of any kind, if anyone knows what wattage it is then that would be a great help, i've already searched around the net without success.