Purchased a 280X, which slot on my motherboard is x16?

amar467

Honorable
Apr 4, 2013
10
0
10,520
The title says it all, just purchased a xfx 280X and is written on the box that it should be plugged in x16 graphic slot my motherboard is gigabyte 970a ud3, it has 1 slot of x16 but which one is it? And it says on the box that it requires a 750w psu does it really need a 750w?, I have a corsair vs 650w with 50 amps on the +12v rail, will this psu do?, I have 8120,8gb ram, 1hdd 160gb