My husband's graphic's card is starting to have issues. A very good friend of his sent him a powercolor radeon hd 5850 he was no longer using but still in good condition. The motherboard in the current computer is a GA-P55-USB3. We installed the graphics card but it didn't work, it wasen't recognizing it and we were getting a yellow light. Is there any tips or something we missed that anyone can help with? Thank you.