R9 390 black screen problem

[dassan]

hello guys i just bought a r9 390 and installed to my pc but i saw that my psu has 1 x 8-pin AUX Power Connector and 1 x 6-pin AUX Power Connector and also my psu is 550 watt. r9 390 needs 2 x 8-pin AUX Power Connector and i put one of the 8 pin into 8 pin and other 6 pin from my psu to other 8 pin. When i opened my pc, i heard windows open sound etc but it was all black screen from the start, even didnt show up bios screen. then i closed it. I really hope it didnt but do you think my r9 390 gpu got burned or something thats why it didnt show anything or it s just not enough energy and nothing happened to my gpu i hope : / ?

 

[96Firebird]

You need to have all power cables plugged in. If your card has 2x 8-pin, you need to have 2x 8-pin plugged in. If your PSU only has 1x 8-pin and 1x 6-pin, you need to use an adapter similar to this. One may have come bundled with your 390.