How To Know The Watts Of My Power Supply. Larger adapters need more power which requires more watts. The earlier models used a 250watt supply the newerlatestlast ones had 305watt PS units.

Max LoadA You can view the maximum amount of current in Amperes which is provided by each Rail. In most cases smaller laptops need a less powerful adapter while larger laptops need a stronger one. As shown in the image above this Chieftec power supply is rated at 500 Watts.
As shown in the image above this Chieftec power supply is rated at 500 Watts.
Its just below each voltage level or Rail. Is there any way to find them out. The result is the total watts that your PC build requires. Its just below each voltage level or Rail.

