Hey guys, I was at my uncles house today as we had a lunch over his house for Christmas. He was showing my his new computer, which he got totally free from a mate at work. Though when he turned it on, nothing displayed on the screen. Though he said last night he was downloading his programs and updates and the computer ran fine. I opened it up, its pretty nice. It's an Athlon x2 2.7ghz. 4gb ddr2 ram at 800mhz and a 9800GTX. I think i've found the culprit. The power supply is only 450w. It's an Asus Vento psu that came with the case, an Asus Vento M9. The 9800GTX requires 2x6 pin as you know. Honestly thats alot for a 450w psu. But we rang the guy who gave it to him and he said he ran it through 3dmark vantage and 06. Put it through furmark and no worries. Honestly the pc would only use 300-350w max, but could the amps on the psu cause this? We tried different monitors and nothing new. VGA then DVI then HDMI dongle, nothing. If you want I took some photos while I was there, i can upload them, just tell me. But guys can you help me find the problem? Thanks EDIT: FIX Hey guys it just seems the card was not installed 100% and came loose. It's all working. I'm extremely surprised to see that card run on that psu but I just ran it through 3dmark 06. It scored 11000. Not too bad for a system of that age. It's all working. . But damn that card is HUGE, look at this photo of it.