Question My gaming PC won't display

Apr 30, 2020
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I've recently built a gaming PC, and added a graphics card. The graphics card is clipped into the motherboard, and only lights up when I put the 6 from the 6+2 pin into the graphics card. However, when I put the 6+2 into the 8 pin, it doesn't light up. My moniter is connected by HDMI to my graphics card, as it doesn't work in the motherboard, but it says no signal, even though it is connected.
Can anybody help me?



Graphics card : Saphire radeon Rx 570 8GB
Motherboard : MSI b450 gaming Pro carbon AC
Power supply :550 W corsair