There is no such thing as a HD 7800 graphics card. There are a series of HD 7800 cards, which one do you have ? The choices will be different if you have a laptop. Please furnish the information required > https://community.amd.com/thread/196209
Use GPU-Z 'Lookup' function.
Yep, and I remember that dxdiag would show my 7970 as 7900 series.
Did you ever figure this out??? I cant update my graphics card. Idk AMD has to make this such a process. I'm not even able to download the program that tells you your graphics card
Try using a program to help find the right driver like "3dp chip" or "Driver Identifier". just be carful and try not to mistake ads for a download button.