Are all 2 6 pins connectors required when using a GPU?

JTP

Honorable
Feb 13, 2014
7
0
10,510
My friend has a HP p6-2312ea and wants to upgrade his GPU. He currently only has an integrated GPU (AMD A4) and I have tried my 570 in it to see how things would go. Before hand I disabled Secure boot and enabled Legacy boot and threw my 570 in there. There was only 1 6 pin connector on his new 700 watt PSU I just fitted him... My card has 2 6 pin slots, so I only put in the one that was there and just hoped itd work. The machine booted and the fans on the GPU were working but I could only get the integrated video to output a video signal. I tried both DVI ports on my card and still no dice.

Is this because I didnt have 2 6 pins? Should he buy 6 pin converter?