I just totally renewed an old PC from '09 and now I'm stuck with a blackscreen and shutdown 20-30 seconds after i start it up, I can hear and see the fans turn, even though they work they work at max speed...
AMD Athlon x2 3ghz
ATI Radeon HD5450
4GB kingston 1333mhz RAM
And a 300 watt PSU, this might be the problem but i have no idea.
(And yes, I tried with the onboard GPU and another CPU. No luck.)