Bad graphics card recognition?

[treboo]

So i just ran the dxdiag and it shown me that my graphics card is radeon hd 7700, but the problem is inside my pc there is a radeon r7 250x. So.. why my computer show bad card? Whats the problem?

 

[AftaabAhmed]

R7 250X is rebranded 7770. Both are same cards, however, you problem may be due to driver issues. If your system has Catalyst driver then uninstall it completely and reinstall it then see whether windows recognize it or not. You can also download GPUz application and see through it whether or not windows is misreading the card 250X as a 7770.