Motherboard wont switch over to graphics card: Sapphire Nitro R7 370 4G D5

Pie972

Reputable
Aug 10, 2015
5
0
4,510
My motherboard is form a pre purched HP Pavilion p6-2143w Desktop PC

specs
AMD A6-365 APU Radeon HD Graphics 2.60 GHz
8GB corsair ram
B800M Max Bron Lepa PSU
64 bit windows 7 Ultimate

My problem is that the board is not automatically switching over to the Sapphire Nitro R7 370 4G D5 card. All i get is a black screen. I've tried disabling onboard graphics in Device Manager with no luck.