I bought a new graphics card gigabyte radeon hd 6570 2gb ddr3. I had 275w power supply back then. After installing the graphics card pc turned on then off.
I asked someone and he said you need 450 w power supply. I then bought a 450w power supply. The power supply ran on previous graphic card (ati x600 series) but giving same problem with new graphics card. Specs:
Optiplex Gx620 Dell motherboard
4gb ddr2 ram
Intel Pentium D 945 3.4ghz
What could be causing the problem? Is it psu or gpu? Please answer