I am trying to play Civilization V on my desktop computer but it is very laggy and thus unplayable. I have been told that I need to change my graphics card. However, when I go to Device Manager, it lists the following two items under "Display Adapters":
ATI Radeon 3000 Graphics
ATI Radeon HD 5700 HD Series
According to dxdiag.exe, my computer is currently using the first (and worse) of the two. How do I switch to the better graphics card? Or am I just running two cards at the same time? I do not understand this at all.
My specs:
OS: Windows 7 64-Bit
Manufacturer: ASUS
Model: CG1330
Processor: AMD Phenom II X6 1035T (6 CPUs), ~2.6 GHz
Memory: 8192 MB RAM
Thanks in advance.