Haven't used it since owning it, bought used and didn't have a PSU to power it up so it was left lying around. Now I have a 550w "great wall" psu which I was given to me for free. When I start the computer up, it gives one long beep, three short beeps. I've done all my ram, with the an old 8600GT the computer runs beautifully, so it's definitely related to either GPU or PSU. Can anyone shed light on whether the PSU is up to the task or not? Or is my gpu just dead.