My EVGA GT 730 (64-bit, DDR5) just got to my house today and I was super excited to get it installed in my pc, as I've never installed a graphics card before and I wanted to get right to playing some games. As it turns out, it didn't work in my PC: http://h20564.www2.hp.com/hpsc/doc/public/display?docId=c03355381. I am very sure that I installed it correctly as it clicked into place when I placed it in and I wasn't able to remove it. When this happened I was suprised, since it has a graphics card power of 25W and I've seen 240W power supplies able to run a GTX 750ti (https://www.youtube.com/watch?v=Vvih2sEeMgw), which has a graphics card power of 60W (or 75?), and since the PC with the GPU I thought would probably not exceed 220W. When I powered my PC on, the LED on the PC went orange and a beeping went off, and I immediately knew that something was wrong as "This power supply has an LED to indicate a possible failure condition when the LED is off and power is connected". My AOC screen also displayed the logo as it normally does on startup, but afterwards it went black and the green light underneath it started flashing and kept on doing so. The LED did go back to the normal white color a few seconds after, but I still could hear a single beep out of the PC occasionally. I still heard the windows 7 start up sound too, even if the screen was completely black. I went to investigate the GPU inside the case and the fan on it was spinning while the screen was black, though I'm not sure if that's anything significant. I removed the GPU from the x16 slot and booted up my PC again and it was fine. Could there be any other reason why this happens? Or is my PSU just too weak? I already disabled the integrated graphics on it beforehand. (Sorry for this being so long)