I have two desktops that were built for me and my grandsons were using for gaming. Both of them died within a month of each other. Was out of work for a while so they have sat for a few months. Was told that since I was not getting a signal that most likely was the graphics cards. I bought one Radeon graphics card to see if it would fix both before buying two. The new card does not require a power plug but after installing neither will power up. From what I read, the graphics card does not need a power plug but concerned I bought the wrong kind of card. One of the desktops had a Radeon in it. The power source is enough at 550w so don't know what I am missing or doing wrong. Can't believe that for at least one of the machines a new card isn't the answer. Any suggestions would be greatly appreciated.