Diamond 7770 hd

[arthurshpi]

He I just bought the Double black Diamond 7770 hd, but when I turn on my PC, the screen is black.

My specs:

Gateway DX4822-03c:

Intel Core 2 Quad Q8400(2.66GHz) 64 bit Quad-Core Processor
8GB DDR2 800
300W power supply

 

[AstroTC]

The 7770 HD requires a 6 Pin PCI-E connect which I doubt your 300W PSU has.

The Card Requires-

Power Supply : 450W (or greater) power supply with one 75W 6-pin PCI Express power connector. Certified power supplies are recommended.

Lucky for you, your case will accommodate a new Power Supply (I would recommend Antec, Corsair or Seasonsic)