Thank you so much. If informations there are real then you have just saved my life
I owe you a beer, bro.
You need a minimum of 330W but don't take any chances, get a good quality 400-500W PSU made by people like Corsair or Seasonics, they might be more expensive but are less likely to destroy your PC or kill you or waste you money like cheap company power supplys.
Not sure what model your power supply is, on the side of your PSU there is a sticker somewhere, type what it says about volts and amps (3.3v- 48A for example).