Power supply for computer

A power supply for a computer, comprising:

• a base including a bottom panel and two end panels connected to two opposite ends of the bottom panel;
• and each of the two end panels being provided with a plurality of first fastening sections and a plurality of second fastening sections;
• a fan assembly including a first frame located above the bottom panel and a heat dissipation fan fixed below the first frame;
• and the first frame being provided with a plurality of third fastening sections that are located corresponding to the plurality of first fastening sections;
• an internal part assembly including a second frame located on the bottom panel and an internal part unit mounted on the second frame;
• and the second frame being provided with a plurality of fourth fastening sections that are located corresponding to the plurality of second fastening sections;
• and
• a cover being configured complementary to and covered on the base, such that all fastened structures formed between the plurality of first fastening sections and the plurality of third fastening sections and all fastened structures formed between the plurality of second fastening sections and the plurality of fourth fastening sections are located in a receiving space defined between the base and the cover, and the cover and the bottom panel of the base are free of any fastening hole for fastening purpose.