So I messed up my first card. It was a Sapphire Radeon R7 260x OC version. I have no APU so I could not access my BIOS because my card didn't work. I bought another card and the instructions said to go into your BIOS and enable it, so it was worthless to me. Then I recently bought another card with no instructions and it won't display. Should I buy an APU to go into my BIOS or should I buy an AMD graphics card being that my current CPU is an AMD Athlon X4 760k? Also my drivers from the first card are still installed on the computer. BTW this is my first computer build